There is a detail buried in Cigna's own published clinical criteria that almost nobody explains to families, and it changes how a Tennessee dual diagnosis case should be argued from the very first phone call.
Cigna does not apply one standard to addiction treatment. It applies two, and they come from different places. For the substance use disorder, it uses the American Society of Addiction Medicine criteria — the addiction field's own framework, the one Tennessee law points to. For the co-occurring mental health condition, it uses MCG, a commercial guideline product from a private vendor. Same person. Same admission. Two different rulebooks, written by two different kinds of organization.
If someone in your family has both a substance use disorder and depression, anxiety, PTSD or bipolar disorder — and roughly half the people in treatment do — then that split is not a technicality. It is the seam where residential authorizations come apart.
This guide is built from named public sources you can open yourself: Evernorth's own published medical necessity criteria, Cigna's coverage policy library, CMS, the U.S. Department of Labor, the Tennessee Department of Commerce and Insurance, the Division of TennCare, ProPublica's investigative reporting, and federal court filings. Where something is contested, both sides are stated. Where a figure is disputed by the company, that is said plainly.
IN AN EMERGENCY, THE POLICY QUESTION WAITS
Under the federal No Surprises Act, emergency care must be billed at in-network cost-sharing rates even when the hospital is out of network. Nobody checks a policy before they check a pulse.
- Call 911 for a suspected overdose. Give naloxone if you have it, and be ready to give a second dose.
- 988 — Suicide & Crisis Lifeline, call or text, any hour.
- Tennessee REDLINE: 800-889-9789 — free, confidential treatment referrals for any Tennessean, insured or not.
- SAMHSA National Helpline: 1-800-662-4357 — free and confidential, 24/7.
Does Cigna Cover Drug and Alcohol Rehab in Tennessee? The Answer Is Yes, and It Tells You Almost Nothing Useful
Every Cigna plan sold on the Tennessee individual market covers substance use disorder treatment, and effectively every group plan Cigna administers does too. That is not goodwill. Mental health and substance use disorder services are one of the ten essential health benefits CMS requires non-grandfathered individual and small-group coverage to include. Annual and lifetime dollar caps on the benefit are prohibited. A pre-existing substance use disorder cannot be used to refuse you a policy or surcharge you for one.
So the headline question is settled before anyone picks up a phone. The questions that actually decide whether a bill arrives are these:
- Does Cigna even sell an individual plan in your Tennessee county? It does not sell everywhere in this state.
- Is the facility contracted for residential substance use treatment — not merely for outpatient therapy?
- Has Evernorth, not Cigna's general medical department, authorized the admission, and for how many days?
- Which criteria set will be applied to each half of a dual diagnosis?
Coverage is not payment. Your plan document says what is covered. A utilization reviewer decides what is authorized. Different departments, different questions — and the second one is where the money lives.
Evernorth, Not Cigna: Who Actually Reviews and Approves Your Tennessee Rehab Admission
Evernorth is The Cigna Group's health services arm, created in 2021. Evernorth Behavioral Health — previously called Cigna Behavioral Health — is the entity that manages utilization review, prior authorization and clinical oversight of mental health and substance use benefits for Cigna commercial members.
In practical terms, the name on your card is Cigna. The people deciding whether a residential admission is medically necessary work for Evernorth. Families who spend two days negotiating with Cigna's general medical authorization line are often two days late, because that is not the department that decides.
The good news, and it is genuinely good, is that Evernorth publishes its criteria openly. Anyone can read them. Very few members ever do, and it is one of the most obvious pieces of unclaimed leverage in this entire field.
Ask this on the first call: is my behavioral health benefit administered by Cigna or by Evernorth, and what is the direct number? Then ask which criteria will be applied to a residential substance use request, and which will be applied to the co-occurring mental health diagnosis. Those are two separate answers, and you want both.
The ASAM and MCG Split: Why Cigna Judges the Addiction and the Mental Illness by Two Different Standards
This is the section no competing article writes, and it comes straight from Evernorth's own published medical necessity criteria.
ONE ADMISSION, TWO RULEBOOKS
How Evernorth reviews a Tennessee dual diagnosis case.
ASAM Criteria
Developed by the American Society of Addiction Medicine — a nonprofit clinical specialty society.
Fourth Edition for adults 18+. Third Edition for ages 17 and under. Six-dimension assessment.
MCG Behavioral Health Guidelines
Developed by MCG Health — a commercial clinical guideline vendor.
Used for mental health level-of-care reviews across all health plan business, except where state law requires otherwise.
Source: Evernorth Behavioral Health, published medical necessity criteria, and Cigna coverage policy library. LOCUS and CALOCUS-CASII are used for mental health reviews in California, Colorado and New York under those states' laws. Tennessee is not among them.
Why the Split Matters Enormously in a Tennessee Residential Request
Tennessee's own parity statute, Tenn. Code Ann. § 56-7-2360, requires insurers to use ASAM clinical review criteria, or other evidence-based clinical guidelines, for substance use disorders. Evernorth does use ASAM. On that half of the case, Tennessee law and Cigna's stated practice line up.
On the mental health half, there is no equivalent Tennessee mandate pointing to a clinical specialty society's framework, and Evernorth's stated default is MCG. California, Colorado and New York legislated their way to LOCUS. Tennessee did not.
So here is the trap. A person is admitted to residential care for alcohol use disorder with severe co-occurring depression. The addiction stabilizes first — it usually does, because withdrawal resolves faster than a mood disorder. At the first concurrent review, the ASAM picture looks better. The depression has barely moved, because depression does not move in seven days. If the reviewer is weighing the substance use dimension under ASAM and treating the psychiatric condition as a separate question under a separate guideline, the case for continued residential care can quietly fall between the two.
WHAT TO SAY, AND WHY IT WORKS
Ask, on the record, for concurrent dual diagnosis treatment: the substance use disorder and the mental health condition treated at the same time, in the same program, not sequenced one after the other. Then ask the clinician to write the continued-stay request so that the psychiatric instability is documented inside the ASAM dimensions where it belongs — Dimension 2 (biomedical), Dimension 3 (emotional, behavioral and cognitive conditions), Dimension 5 (relapse and continued use potential) and Dimension 6 (recovery environment).
That is not a rhetorical trick. It is what the ASAM framework is built to capture, and it is precisely the reasoning that generally accepted standards of care require: co-occurring conditions treated in a coordinated way that accounts for how each makes the other worse.
Cigna's own historical criteria document, still published for reference, states that it was developed with input from advocacy groups including NAMI and Mental Health America, and from professional bodies including the American Psychiatric Association and the American Society of Addiction Medicine. That is a fair thing for the company to say. It is also a standard it can be held to in writing.
Where Cigna Actually Sells Individual Health Plans in Tennessee, and the Counties Where It Does Not
Most national rehab pages list Cigna as a "Tennessee insurer" and stop there. That is lazy, and in some parts of this state it is simply wrong.
Tennessee is divided into eight geographic rating areas defined by CMS. The Tennessee Department of Commerce and Insurance publishes which carriers participate in each. In its listing of Marketplace carriers by rating area, Cigna appears in Rating Areas 3, 4, 5 and 6 — and it does not appear in the carrier lists published for Rating Areas 7 and 8.
CIGNA IN TENNESSEE'S MARKETPLACE RATING AREAS
Based on the carrier-by-rating-area listing published by the Tennessee Department of Commerce and Insurance.
Listed
Listed
Listed
Listed
Not listed
Not listed
Not readable from source
Not readable from source
The Rating Area 1 and 2 lines could not be read directly, because the Department's page restricts automated access. They are shown here as unverified rather than guessed at. Rating areas are defined by CMS; carrier participation is set annually and changes.
Two things follow, and the second one is the one that costs money.
Availability is a ZIP-code question, not a state question. Enter your ZIP on HealthCare.gov and read the carrier list it returns for your address on the day you are shopping. That list beats any article, including this one, and it takes ninety seconds.
Cigna's Tennessee individual plans are EPO designs. This is the sentence to sit with:
An EPO pays nothing toward out-of-network treatment outside an emergency. Not a reduced amount. Nothing. If the residential program your family trusts is not contracted with Cigna and Evernorth, and you hold a Cigna EPO, parity law will not rescue you. The plan has not treated addiction worse than surgery. It has drawn a network boundary, and you are standing outside it.
In practice this means a Cigna policy is, quietly, a facility decision. Our market-by-market breakdowns of insurance providers that cover rehab in Nashville and insurance providers that cover rehab in Knoxville both land on the same structural point from different angles: in Tennessee, only one carrier sells broad PPO designs at scale, and Cigna is not it.
Which Cigna Product You Hold Determines Who Administers Your Rehab Benefit and Which Regulator Can Help You
"I have Cigna" is not one thing. Find your row before you call anyone, because it changes your rights, not just your copay.
| Your Cigna product | What governs the rehab benefit | Who acts on a denial complaint |
|---|---|---|
| Cigna individual / Marketplace EPO | ACA essential health benefits, federal parity, Tennessee insurance code including the ASAM requirement | Tennessee Department of Commerce and Insurance |
| Fully insured employer plan (Cigna carries the risk) | Federal parity plus Tennessee insurance mandates | Tennessee Department of Commerce and Insurance |
| Self-funded employer plan (Cigna administers only, on an ASO basis) | ERISA and the employer's own Summary Plan Description. State benefit mandates are preempted. | U.S. Department of Labor, EBSA |
| Tennessee state and higher education employees (Partners for Health) | Medical coverage through Cigna or BlueCross — but behavioral health routed to Optum, not Evernorth | Plan administrator and the state benefits program; escalation depends on plan structure |
| Cigna Medicare Advantage | Medicare Advantage rules under CMS | Centers for Medicare & Medicaid Services, Medicare appeals |
Sources: CMS; U.S. Department of Labor EBSA; Tennessee Department of Commerce and Insurance; State of Tennessee Partners for Health carrier and network information.
The Row That Catches Tennessee State Employees Out
Look at row four again, because it is a genuine trap and it affects a lot of households in this state — teachers, university staff, state agency workers.
If you are on the Tennessee state employee plan with Cigna as your medical carrier, your behavioral health benefit is administered by Optum — a UnitedHealth Group company, not a Cigna one. Calling Evernorth about a rehab authorization would be a reasonable thing to do and an entirely wasted afternoon. The number you need is Optum's. Confirm it before you need it.
Levels of Addiction Treatment Cigna Covers, the Prior Authorization Rules, and the Concurrent Review Clock
Evernorth does not think in terms of "rehab." It thinks in levels of care. Knowing the ladder tells you where a Tennessee request sails through and where it meets resistance.
| Level of care | Prior authorization typically required? | Where the friction sits |
|---|---|---|
| Medically managed detoxification | Yes | Usually the easiest to authorize. Acute withdrawal risk is visible and the stay is short. |
| Residential treatment | Yes | The most contested and most expensive level. Expect the argument that a lower level would do. |
| Partial hospitalization (PHP) | Yes | Routinely offered as the "step down" alternative to residential. Cigna's criteria treat it as an ambulatory service and do not cover boarding. |
| Intensive outpatient (IOP) | Yes | Approved more readily, which is exactly why it gets proposed in place of residential. Boarding is likewise not covered. |
| Outpatient therapy and medication for opioid use disorder | Generally no, in network | The most evidence-supported treatment for opioid use disorder, and the most consistently covered. |
Levels of care and the ambulatory-boarding exclusion per Cigna's published Standards and Guidelines / Medical Necessity Criteria. Authorization requirements vary by plan, product line and employer group, and self-funded plans follow the employer's Summary Plan Description rather than standard Cigna designs.
Why "Thirty Days Approved" Is Almost Never What Was Actually Authorized
A treatment center says the program is thirty days. Evernorth approves the admission. Everyone breathes out. What actually happened is that Evernorth authorized an opening block of days and set a concurrent review — a reassessment, partway through, of whether the person still meets criteria for that level of care.
HOW OFTEN CIGNA REASSESSES, BY LEVEL OF CARE
Typical concurrent review intervals. Longer bar means longer between reviews.
Residential treatment — roughly every 5 to 7 days
Partial hospitalization — roughly every 7 to 14 days
Intensive outpatient — roughly every 2 to 4 weeks
Intervals per provider-facing payer documentation for Evernorth Behavioral Health. They vary by plan and by clinical circumstance. The pattern is the point: the more expensive the level of care, the more often it is questioned.
Notice what that cadence means. In residential care — the level families most want and most struggle to keep — the person's continued stay is being re-argued roughly once a week. And improvement is not your friend in that conversation. A person stabilizing is precisely the evidence a reviewer uses to propose a step down.
Ask, in writing: how many days have you authorized? Not how long the program lasts. Not whether the person is "approved." How many days — and when does the first concurrent review fall. Put that date in your calendar the day of admission.
What the PXDX Investigation and the Federal Court Ruling Reveal About How Cigna Reviews Claims
You cannot write an honest trust-and-transparency article about Cigna in 2026 without addressing this, and you cannot address it fairly without giving the company's side.
In March 2023, ProPublica, working with The Capitol Forum, reported that Cigna used an internal system called PXDX — shorthand for procedure-to-diagnosis — that allowed its medical directors to reject claims in bulk without opening patient files. Former Cigna doctors told ProPublica they signed off on denials in batches. The reporting said Cigna physicians denied more than 300,000 claims over two months in 2022 through the system, an average of roughly 1.2 seconds of review per claim.
The House Committee on Energy and Commerce subsequently wrote to Cigna. In doing so, its chair noted that policyholders on Cigna's Medicare Advantage plans appeal about one in five prior authorization denials — and that roughly 80% of those appealed denials are overturned.
CIGNA'S RESPONSE, STATED IN FULL FAIRNESS
Cigna disputed the characterization forcefully and published a public explanation. Its position, in summary:
- PXDX applies to roughly 50 common, low-cost services, and exists to verify that codes were submitted correctly against publicly available coverage policies.
- It is a post-service claims process, not prior authorization. Patients receive the treatment; the dispute is about payment afterward.
- Denials through the process represent under 1% of Cigna's total claims volume, with 94% approved.
- Incorrectly coded claims can be resubmitted, reviewed with the physician, or appealed.
In July 2023 two Cigna members filed a class action in the Eastern District of California. On March 31, 2025, the court allowed the case to proceed, finding that the plaintiffs had adequately pleaded that delegating medical necessity decisions to the automated system conflicted with plan terms requiring review by a medical director — and holding that Cigna's contrary interpretation was an abuse of discretion at the pleading stage. That is a procedural ruling, not a final judgment on the merits, and it should not be reported as one.
What This Does and Does Not Mean for a Tennessee Rehab Claim
What it does not mean. There is no public evidence that PXDX was applied to residential substance use treatment. On the company's own account it covers common low-cost procedures, and rehab admissions are neither. Anyone telling you Cigna denies rehab claims with an algorithm is going beyond the record.
What it does mean. Two things, and both are usable.
First, that 80% overturn figure on appealed Medicare Advantage prior authorization denials is extraordinary, and it tells you what a denial actually is. It is an opening position. A denial that gets challenged, with documentation, is frequently reversed — and the overwhelming majority of people simply never challenge one.
Second, the litigation turns on a principle that applies squarely to your case: a plan must actually apply the criteria it says it applies. If a Tennessee residential denial arrives and cannot tell you which ASAM dimensions were assessed, which clinical facts failed them, and who assessed them, that is a question worth putting in writing — to Evernorth, and to the Tennessee Department of Commerce and Insurance.
The Tennessee Parity Law and the 2025 Federal Enforcement Pause: What You Can Still Demand From Cigna in 2026
Tennessee's parity statute does more than point at ASAM. It also obliges the Tennessee Department of Commerce and Insurance to enforce federal parity, to request detailed analyses of how plans construct their non-quantitative treatment limitations, and to report annually to the General Assembly. Those Mental Health Parity Reports are published, including a 2026 edition. They are dry and they are worth reading.
Federally, the picture shifted in 2025 and most rehab pages have not caught up. In September 2024 the Departments of Labor, Health and Human Services, and the Treasury issued a final rule substantially tightening the Mental Health Parity and Addiction Equity Act. The ERISA Industry Committee sued in January 2025. Rather than defend the rule, the Departments announced on May 15, 2025 that they would not enforce the 2024 Final Rule — not during the litigation, and then for a further eighteen months after it resolves.
WHAT IS PAUSED, AND WHAT IS EMPHATICALLY NOT
Still fully in force: the parity statute itself, as amended by the Consolidated Appropriations Act 2021. The 2013 final rule. Your right to parity in cost-sharing and treatment limits. And the requirement that a plan prepare a comparative analysis of its non-quantitative treatment limitations and hand it over on request.
Not currently being enforced: the 2024 additions — the "meaningful benefits" test, the outcomes-data requirement, and the fiduciary certification.
So the practical takeaway for a Tennessee family appealing a Cigna residential denial this year is narrow but real. You can still demand the comparative analysis, and the plan still has to produce one. Almost nobody asks. What you cannot lean on are the 2024 rule's tougher evidentiary standards.
One further piece of 2025 and 2026 context worth knowing: Cigna removed 96 procedure codes from its prior authorization list for dates of service on and after May 31, 2025, and the largest insurers, Cigna among them, publicly pledged in June 2025 to reduce the scope of prior authorization by January 1, 2026. Whether any of that reached residential behavioral health is a fair question to ask Evernorth directly. If you get a straight answer, you will know more than most people do.
How to Verify Cigna Rehab Benefits in Tennessee Before Admission Without Relying on a Treatment Center's Word
Most treatment centers will offer to verify your insurance for free. It is convenient, and it is also a sales function. The facility has a commercial interest in telling you that you are covered. It is not a neutral party, and a verification of benefits is not a guarantee of payment. Evernorth's own provider guidance says as much: benefits verification does not guarantee payment.
Do it yourself in parallel. It costs one phone call.
THE CIGNA VERIFICATION CALL, SCRIPTED
- Who administers my behavioral health benefit — Cigna, Evernorth, or a third party such as Optum? What is the direct number?
- Is my plan fully insured or self-funded? (If they cannot say, ask HR and do not let it drop. It decides which regulator can help you.)
- Is [facility name], at [address], in network for residential substance use disorder treatment? Name the level of care out loud. Facilities are routinely in network for outpatient and out of network for residential.
- Is this an EPO? If so, confirm that out-of-network residential treatment pays nothing outside an emergency.
- Which criteria apply to the substance use disorder review — and which apply to the co-occurring mental health diagnosis? Ask for both answers.
- Is dual diagnosis treatment covered concurrently, or must the mental health condition be treated separately?
- Does residential require prior authorization? Who submits it, and how long does a decision take?
- What is my remaining deductible and out-of-pocket maximum this benefit year?
- Please give me a reference number for this call and the representative's name.
Write the reference number down and keep it somewhere you will find it in six months. When a claim is denied long after the fact, a logged call in which the plan confirmed a facility was in network for residential care is one of the very few pieces of leverage an ordinary member reliably holds.
Appealing a Cigna Rehab Denial in Tennessee: The Two Internal Levels, the Peer-to-Peer, and the External Review
A denial is an opening position, not a verdict. Cigna's commercial appeal process generally runs to two internal levels, with first-level appeals typically due within 180 days of the adverse determination — though timeframes vary by plan, and a self-funded employer plan runs on its own document. After internal appeals are exhausted, external review by an independent review organization is available as federal and state law require.
There is also a step families rarely know exists.
| Step | What it actually is | What decides whether it works |
|---|---|---|
| Peer-to-peer review | Your treating clinician speaks directly to a Cigna or Evernorth medical director. Available on request after a denial. | Whether your clinician argues in ASAM's language, dimension by dimension, rather than telling a general clinical story. |
| First-level internal appeal | A formal written challenge, generally due within 180 days of the denial. Deadlines vary by plan. | Documentation. Withdrawal history, failed prior outpatient attempts, co-occurring psychiatric diagnosis, housing instability. |
| Expedited appeal | A shortened-timeline appeal where the person is in active withdrawal or at imminent risk. | Asking for it explicitly. Standard timelines are useless in an acute situation and nobody offers this unprompted. |
| Second-level internal appeal | A further internal review, where the plan design provides for one. | New evidence, not the same evidence restated more loudly. |
| External review | An independent review organization that does not work for Cigna. Its decision binds the plan. | Simply knowing it exists. Most people do not, and the right expires if internal deadlines are missed. |
Appeal structure and timeframes per Evernorth and Cigna provider documentation and federal appeal-rights rules. Deadlines vary by plan and by product line; confirm yours in writing. Self-funded plans follow the employer's Summary Plan Description.
Alongside all of this, request the plan's comparative analysis of its non-quantitative treatment limitations. It is a federal right that survives the enforcement pause, and hardly anyone exercises it.
Nothing in this section is legal advice, and this article was not written by a lawyer, a physician or an insurance broker. It describes rights that federal and state agencies publish themselves. Tennessee has legal aid organizations and health navigators who do this work at no charge, and if an appeal is going badly they are the people to call — before the bill arrives, not after.
Why Tennessee's Overdose Data Should Shape the Dual Diagnosis Questions You Put to Cigna
Tennessee's overdose picture is improving, and it is improving from a bad position. CDC-derived surveillance put the state at roughly 2,499 drug overdose deaths in 2024 — a steep year-over-year decline by national standards — with fentanyl and other synthetic opioids involved in around two-thirds of them. The state's overdose death rate still sits well above the national average.
Two features of that data bear directly on the ASAM-and-MCG split described earlier.
This is a polysubstance crisis. Fentanyl rarely appears alone. Stimulants, benzodiazepines and alcohol turn up alongside it with grim regularity. A single-substance, short-stay detox is not a plan for that. It is a pause.
It is also, very often, a co-occurring disorder problem. Roughly half of people who experience a substance use disorder will also experience a mental illness at some point, and the reverse holds too, according to the National Institute on Drug Abuse. Which means the two-rulebook problem is not an edge case. For a large share of the people admitted to residential treatment in this state, it is the ordinary situation.
So do not ask Cigna whether "rehab" is covered. Ask whether the substance use disorder and the mental health condition will be treated at the same time, in the same program — and ask which criteria will be applied to each. Our overview of medication-assisted treatment across Middle Tennessee covers how MAT and behavioral therapy fit together in an integrated plan, and our explainer on inpatient rehab versus outpatient treatment walks through how the level-of-care decision is normally made clinically.
If Cigna Will Not Pay, or You Have No Coverage at All: Tennessee's Free and State-Funded Treatment Routes
Cigna does not participate in TennCare, so unlike some carriers there is no Medicaid fallback under the same brand. And because Tennessee has not expanded Medicaid, there is a band of low-income adults who earn too much for TennCare and too little for Marketplace premium tax credits. Treatment is still available. These routes do not require an insurance card.
- Tennessee REDLINE, 800-889-9789. A free, confidential referral line run by TAADAS under contract with the state, operating since 1989 and explicitly available whether or not you hold insurance. Call or text, any hour.
- The Substance Abuse Prevention and Treatment Block Grant, administered through the Tennessee Department of Mental Health and Substance Abuse Services, contracts federal money to local facilities to treat people who cannot pay.
- FindTreatment.gov and the SAMHSA National Helpline, 1-800-662-4357. The federal locator is filterable by the payment options a facility accepts, including sliding scale and no-cost care.
- Federally Qualified Health Centers across Tennessee provide behavioral health care on a sliding fee scale based on income, and they accept TennCare. They are not luxury facilities. For a great many people they are the difference between treatment and nothing.
Our full directory of drug and alcohol addiction resources in Tennessee lists county health departments, nonprofits and academic programs across the state, most of which will begin a conversation with you regardless of coverage status.
Limitations, Data Caveats, and How This Cigna Tennessee Rehab Coverage Guide Was Researched
Being straight about what this article is, and where its edges are, is part of being useful on a subject this serious.
What this is. An editorial explainer built from named public sources, every one linked below: Evernorth's published medical necessity criteria, Cigna's coverage policy library and its own Standards and Guidelines document, CMS, the U.S. Department of Labor, the Tennessee Department of Commerce and Insurance, the Division of TennCare, the Tennessee Department of Health, the CDC, NIDA, ProPublica, and reporting on federal court filings. It reflects information available as of July 2026.
What this is not. It is not medical advice, legal advice or insurance advice. It has not been medically reviewed, and no claim is made here that it has. It is not affiliated with, endorsed by, or paid for by The Cigna Group, Evernorth, or any treatment provider. No carrier or facility is recommended over another, because the right plan depends entirely on which providers you need in network, and the right facility depends on a clinical assessment this article cannot perform.
On the rating-area map. The Rating Area 1 and 2 rows are shown as unverified because the Tennessee Department of Commerce and Insurance page restricts automated access and those lines could not be read directly. They have been left blank rather than guessed at. Carrier participation is set annually. Confirm by entering your ZIP code on HealthCare.gov, which returns the definitive list for your address.
On prior authorization and concurrent review intervals. These are drawn from provider-facing payer documentation for Evernorth Behavioral Health rather than from a public consumer-facing schedule, because Cigna does not publish one in that form. They vary by plan, product line and employer group. Treat them as a strong guide to the mechanism, not a guarantee about your specific policy.
On PXDX. ProPublica's findings and Cigna's rebuttal are both set out above, deliberately. The March 2025 ruling allowed the class action to proceed; it is a procedural decision, not a finding of liability, and it is not reported here as one. There is no public evidence that PXDX was applied to residential substance use treatment, and this article does not suggest there is.
On the 80% overturn figure. That statistic refers to appealed prior authorization denials in Cigna's Medicare Advantage plans, as cited by the House Energy and Commerce Committee. It is not a commercial-plan figure and it is not a rehab-specific figure. It is included because it says something true and important about what a denial is worth — not because it can be applied directly to your claim.
Verify before you rely. Plan documents beat articles. Regulator websites beat plan marketing. If something here matters to a decision you are about to make this week, open the source and read it yourself.
One last honest note. The commonest source of financial harm in addiction treatment is not a hostile insurer denying a claim in bad faith. It is a frightened family accepting a facility's verbal assurance of coverage, then learning months later that the authorization covered a fraction of the stay — and never appealing, because nobody told them they could. Slow down for one phone call and one reference number. In a situation with very few good options, that one is free.
Related Reading From Our Tennessee Addiction Treatment Archive
References and Citations
- Evernorth Behavioral Health. Medical Necessity Criteria (ASAM Criteria for substance use disorder; MCG Behavioral Health Guidelines for mental health; LOCUS and CALOCUS-CASII where state law requires). https://static.evernorth.com/assets/evernorth/provider/resourceLibrary/behavioralResources/medicalNecessityListing.html
- Cigna for Health Care Professionals. Coverage Policies — Behavioral Medical Necessity Criteria. https://static.cigna.com/assets/chcp/resourceLibrary/coveragePolicies/index.html
- Evernorth Provider Newsroom. Annual Review of Behavioral Health Medical Necessity Criteria (ASAM 4th Edition for adults 18+; ASAM 3rd Edition for ages 17 and under). https://providernewsroom.com/evernorth/behavioral-health-medical-necessity-criteria-updates-2/
- Cigna. Standards and Guidelines / Medical Necessity Criteria for the Treatment of Mental Health and Substance Use Disorders (2020 Edition, retained for reference). https://static.evernorth.com/assets/evernorth/provider/pdf/resourceLibrary/behavioral/cigna-standards-and-guidelines-medical-necessity-criteria-2020-Edition.pdf
- Cigna Healthcare Provider Newsroom. Cigna Healthcare Removes 96 Codes From the List of Services That Require Prior Authorization (effective May 31, 2025). https://providernewsroom.com/cigna-healthcare/cigna-healthcare-removes-96-codes-from-the-list-of-services-that-require-prior-authorization/
- ProPublica. How Cigna Saves Millions by Having Its Doctors Reject Claims Without Reading Them. March 2023. https://www.propublica.org/article/cigna-pxdx-medical-health-insurance-rejection-claims
- ProPublica. Congressional Committee, Regulators Question Cigna System That Lets Its Doctors Deny Claims Without Reading Patient Files (House Energy and Commerce Committee correspondence; Medicare Advantage appeal and overturn figures). https://www.propublica.org/article/cigna-health-insurance-denials-pxdx-congress-investigation
- Centers for Medicare & Medicaid Services. Information on Essential Health Benefits (EHB) Benchmark Plans. https://www.cms.gov/marketplace/resources/data/essential-health-benefits
- HealthCare.gov. Mental Health and Substance Abuse Health Coverage Options. https://www.healthcare.gov/coverage/mental-health-substance-abuse-coverage/
- HealthCare.gov. External Review (Independent Appeal). https://www.healthcare.gov/appeal-insurance-company-decision/external-review/
- U.S. Department of Labor, Employee Benefits Security Administration. Mental Health Parity and Addiction Equity Act — Laws and Regulations. https://www.dol.gov/agencies/ebsa/laws-and-regulations/laws/mental-health-parity
- U.S. Departments of Labor, Health and Human Services, and the Treasury. Statement Regarding Enforcement of the Final Rule on Requirements Related to MHPAEA. May 15, 2025. https://www.dol.gov/agencies/ebsa/laws-and-regulations/laws/mental-health-parity/statement-regarding-enforcement-of-the-final-rule-on-requirements-related-to-mhpaea
- Centers for Medicare & Medicaid Services. Tennessee Geographic Rating Areas. https://www.cms.gov/cciio/programs-and-initiatives/health-insurance-market-reforms/tn-gra
- Tennessee Department of Commerce and Insurance. Health Insurance Information (Marketplace carriers by rating area; Mental Health Parity Reports, 2024–2026). https://www.tn.gov/commerce/insurance/consumer-resources/health-insurance-information.html
- ParityTrack (The Kennedy Forum). Tennessee Statutes — Tenn. Code Ann. § 56-7-2360 and related parity provisions requiring ASAM criteria. https://www.paritytrack.org/reports/tennessee/statutes/
- State of Tennessee, Partners for Health. Health Insurance Carrier and Network Information (state employee plan; behavioral health administered by Optum). https://www.tn.gov/partnersforhealth/health-options/health.html
- Division of TennCare, State of Tennessee. Managed Care Organizations. https://www.tn.gov/tenncare/members-applicants/managed-care-organizations.html
- Tennessee Department of Health. Drug Overdose Surveillance and Reporting. https://www.tn.gov/health/odsurveillance.html
- Centers for Disease Control and Prevention. Overdose Prevention. https://www.cdc.gov/overdose-prevention/about/index.html
- National Institute on Drug Abuse. Common Comorbidities with Substance Use Disorders. National Institutes of Health. https://nida.nih.gov/publications/research-reports/common-comorbidities-substance-use-disorders
- American Society of Addiction Medicine. The ASAM Criteria. https://www.asam.org/asam-criteria
- Substance Abuse and Mental Health Services Administration. FindTreatment.gov. https://findtreatment.gov/
- Tennessee Department of Mental Health and Substance Abuse Services. Tennessee REDLINE. https://www.tn.gov/behavioral-health/substance-abuse-services/prevention/tennessee-redline.html
- Centers for Medicare & Medicaid Services. No Surprises Act. https://www.cms.gov/nosurprises
All sources accessed and verified in July 2026. Insurance networks, prior authorization requirements, clinical criteria and federal parity enforcement policy are all subject to change, in some cases at short notice. Where this guide and a primary source disagree, the primary source is right.
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