The Mental Health Parity Right: How to Use the 2024 MHPAEA Final Rule to Reverse Behavioral Health Denials

Twenty hours per week for the seven-year-old's applied behavior analysis. Forty-four hours per week, two months earlier, for the boy's grandmother's post-stroke physical therapy. Same carrier. Same family. Same letterhead. One authorization cut a board-certified behavior analyst's clinical request in half. The other authorized more than was even asked for and required no weekly justification from the treating clinician. The boy had been diagnosed with autism spectrum disorder at age three; the dose his clinical team had requested, 40 hours per week, was the dose the field's consensus guidelines describe as the minimum effective intensity for a child in his presentation. The carrier's letter to his mother, a single parent who works as a paralegal in Albany, said 20 hours was the standard authorization "in accordance with our medical-necessity criteria for behavioral health services." She set the two letters on the kitchen table side by side in November. The federal statute that governs that exact mismatch had existed since 2008. The regulation that gave her a written-document right to demand the carrier's parity analysis had taken effect with the 2025 plan year. She had never heard of either.

The Mental Health Parity and Addiction Equity Act of 2008, at 29 USC 1185a, requires that plans covering behavioral health impose limitations no more restrictive than those on medical and surgical benefits. The 2024 MHPAEA Final Rule at 89 Fed. Reg. 77586 (Sept. 23, 2024), effective for plan years beginning on or after January 1, 2025, added a document right that did not previously exist: the plan must furnish, on request, the written comparative analysis it is required to maintain comparing its non-quantitative treatment limitations on behavioral health to its NQTLs on medical and surgical care. The analysis becomes part of the appeal record. The Department of Labor signaled in early 2025 that its direct MHPAEA enforcement would shift toward technical assistance rather than penalty actions under the new administration. The practical effect: the patient-led appeal, grounded in the comparative-analysis document the participant now has the right to request, is the primary remaining remedy.

What MHPAEA actually requires

MHPAEA does not require a plan to cover behavioral health. It requires that if a plan does, the financial requirements and treatment limitations applied be no more restrictive than the predominant requirements and limitations applied to substantially all medical and surgical benefits in the same classification. The statute distinguishes quantitative treatment limitations, such as visit caps and dollar ceilings, from non-quantitative treatment limitations, which are the structural rules that govern access even when no number is attached. Prior authorization, step therapy, medical-necessity criteria, network admission standards, outlier auditing, facility-of-service exclusions, and reimbursement methodologies are all NQTLs. The parity analysis asks, for each NQTL applied to a behavioral benefit, whether the same NQTL is applied as stringently and on comparable processes, strategies, evidentiary standards, and factors to medical and surgical benefits in the same classification. If it is not, the NQTL violates parity.

Substance use disorder treatment receives the same MHPAEA protections plus additional protections under separate federal law. The CARES Act amendments to 42 USC 290dd-2, implemented at 42 CFR Part 2, establish heightened confidentiality rules that affect how the appeal record is built and disclosed. The 2024 Final Rule treats both categories together for parity purposes but does not displace the Part 2 framework. A substance use disorder parity appeal should be built with Part 2 disclosures in mind, not folded into a general mental health appeal.

What the 2024 Final Rule changed

The Final Rule made three structural changes. First, it codified the requirement that the plan maintain a written comparative analysis of each NQTL applied to behavioral health benefits, with content including the factors used to design the NQTL, the evidentiary standards relied upon, the processes and strategies applied, and a comparison to how the same factors and standards apply to medical and surgical benefits. Second, it codified the participant's right to request a copy free of charge, cross-referenced into the ACA disclosure framework at 45 CFR 147.136 and the ERISA claims-procedure regulation at 29 CFR 2560.503-1. Third, it required the analysis be in writing, dated, and current as of the plan year in which the benefit was denied. A generic template or an analysis prepared for a different plan year does not satisfy the regulation.

The document right lives at 29 CFR 2590.712(d)(3) for ERISA plans, with parallels at 45 CFR 146.136 and 45 CFR 147.160 for non-ERISA group and individual market plans. The Departments of Labor, HHS, and the Treasury jointly issued implementation guidance in late 2024 confirming that incomplete or non-responsive production is itself evidence of a parity violation.

Plans often resist. Common refusals: the analysis is confidential business material, the participant cannot receive analyses prepared by a delegated vendor, the analysis applies plan-wide rather than to the specific claim. None of those refusals tracks the regulation. The Final Rule expressly contemplates participant access, expressly extends to delegated vendors, and expressly requires the analysis to address each NQTL the plan applies. A refused request should be preserved in writing and cited as a separate parity violation.

How the comparative-analysis right works

The comparative-analysis right is most effective when paired with the ERISA or ACA document request the participant is already filing on the underlying denial. The carrier processes both through the same compliance channel, and the analysis becomes part of the same record the appeal will build on. The 2024 implementation guidance and the 2024 MHPAEA Report to Congress confirm production within 30 days as the operative benchmark. A refusal becomes appeal evidence on its own terms.

Apellica drafts the comparative-analyses demand letter for every mental health and substance use disorder case the desk takes on, with the right combination of 29 CFR 2590.712(d)(3), 45 CFR 146.136(c)(4), and 45 CFR 147.160 cites for the participant's specific plan type, and the certified-mail tracking that establishes the production clock.

The six most common parity violations

The patterns below appear repeatedly in the Department of Labor's annual MHPAEA Report to Congress, in state parity findings published by California, New York, Illinois, and Massachusetts, and in the appeals Apellica has prepared.

Prior authorization on behavioral with none on analogous medical. Prior authorization for outpatient mental health visits beyond a small initial allotment, or for any inpatient behavioral admission, while no comparable requirement attaches to outpatient primary care or inpatient medical admissions.

Step therapy unique to behavioral. Fail-first protocols on psychotropic medications, psychotherapy modalities, or residential-to-outpatient levels of care without a parallel step requirement on medical alternatives in the same classification.

Network adequacy gaps in behavioral providers. A behavioral network that on paper meets state adequacy standards but in practice contains a high share of providers not accepting new patients, while the medical network is meaningfully more accessible. The Final Rule expressly identifies network composition as an NQTL subject to parity analysis.

Outlier-utilization auditing only of behavioral providers. Retrospective review, fraud-waste-and-abuse audits, and recoupment actions applied disproportionately to behavioral providers based on utilization thresholds the plan does not apply to medical or surgical providers.

Restrictive medical-necessity criteria, including LOCUS and CALOCUS misuse. Internal criteria stricter than the generally accepted standards of care, often by misusing acuity instruments such as LOCUS or CALOCUS as denial gates rather than as the placement aids their developers designed them to be.

Facility-of-service exclusions only on behavioral. Exclusion of residential treatment, partial hospitalization, or intensive outpatient programs in behavioral health while covering analogous categories on the medical side, including skilled nursing, inpatient rehabilitation, and home-health intensive programs.

The Wit v. UBH precedent and how to apply it

Wit v. United Behavioral Health, 2019 WL 1033730 (N.D. Cal. Mar. 5, 2019), is the single most important medical-necessity precedent in behavioral health. The Northern District of California, in a 106-page opinion by Chief Magistrate Judge Joseph C. Spero, found that United Behavioral Health had applied internal level-of-care criteria more restrictive than the generally accepted standards of care for mental health and substance use disorder treatment, and had used those criteria to deny medically necessary treatment to tens of thousands of plan participants. The Ninth Circuit's subsequent treatment at 79 F.4th 1029 (9th Cir. 2023) narrowed the remedy on procedural grounds but did not disturb the trial court's factual findings. The substantive principle, that a behavioral insurer's internal criteria must conform to the generally accepted standards of care and to the criteria the carrier has published, remains controlling persuasive authority across federal courts.

The application is direct. If the criteria applied differ from the criteria published, the appeal cites Wit. If the published criteria are stricter than the generally accepted standards of care, the appeal cites Wit. If the carrier cannot produce a comparative analysis demonstrating parity, the appeal cites the 2024 Final Rule and Wit together.

In 2024, Anthem agreed to pay $12.88 million to settle a class action alleging the carrier had systematically capped applied behavior analysis hours for children with autism spectrum disorder below the doses treating clinicians prescribed. The settlement did not adjudicate the parity claim on the merits, but the agreement to pay and to revise authorization practices signaled what the comparative-analyses framework can produce. The individual appeal cannot replicate a class settlement. The framework, that hour caps on ABA unsupported by comparable caps on analogous medical care violate MHPAEA, is what the individual appeal should be built on.

Why this is harder than it looks

MHPAEA appeals turn on the comparative-analysis document the carrier was required to maintain and the NQTL parallelism that document either confirms or fails to confirm. Reading the comparative analysis competently is itself specialized work: the analysis runs dozens of pages, references multiple medical-policy vendors, and identifies factors, evidentiary standards, processes, and strategies in technical UM language. The mapped library Apellica has catalogued (more than two hundred carrier-by-denial-type cells, indexed at the bulletin level) each route mental health appeals through a different behavioral-health subcontractor (Optum, Magellan, Carelon, internal), and the NQTL applied at one is not the NQTL applied at another.

The Wit v. UBH precedent operates as the appeal lawyer's library for medical-necessity arguments in behavioral health. The 30-day document-request right requires demand letters with the correct CFR cite for the participant's plan type (ERISA, ACA group, ACA individual, Medicare Advantage). Procedural exhaustion missteps can foreclose external review and (for ERISA) federal civil action.

The participants this article speaks to are often parents of children in active treatment, family members of someone in recovery, or people in their own ongoing care. The carrier's UM department reviews these cases at scale. The participant is reading the comparative-analysis right for the first time, often while managing a treatment schedule.

Forty-four hours of physical therapy for the grandmother. Twenty for the seven-year-old. Same carrier, same letterhead, two letters on the same kitchen table.

What Apellica does that you can't

Apellica's review desk indexes carrier behavior across more than two hundred carrier-by-denial-type cells that tracks MHPAEA enforcement patterns across every major commercial carrier, behavioral-health subcontractor, and Medicare Advantage organization. The desk reads comparative-analysis documents for a living, identifies the NQTL parallelism failures the document either confirms or refuses to address, and pairs the Wit precedent with the appropriate plan-language and clinical-record citations.

Same-day comparative-analyses demand letters go out alongside the underlying document-request letter, with the correct CFR cite. Apellica's senior reviewers build the four-part evidence stack, plan-language citation, clinical facts, peer-reviewed evidence (LOCUS/CALOCUS interpretation, treating-clinician attestation, specialty-society guidelines), regulatory hook grounded in MHPAEA and the 2024 Final Rule, for every case. The 42 CFR Part 2 confidentiality framework is preserved throughout for substance use disorder cases. A senior reviewer reads every appeal before it goes out.

Initial review is free. There is no upfront fee. Participants are not asked to pay anything until the plan reverses the denial.

Exhibit 1: NQTL parallelism check

| Behavioral health limitation in the denial | Analogous medical-surgical limitation the plan probably does not impose | |---|---| | Prior authorization for outpatient psychotherapy beyond initial visit allotment | Prior authorization for outpatient primary care beyond initial visit allotment | | 20-hour-per-week cap on applied behavior analysis | 20-hour-per-week cap on outpatient physical or occupational therapy | | Step therapy requiring trial of generic SSRI before atypical antidepressant | Step therapy requiring trial of generic ACE inhibitor before ARB for hypertension | | Concurrent review every three days for inpatient psychiatric admission | Concurrent review every three days for inpatient medical or surgical admission | | Exclusion of residential treatment for substance use disorder | Exclusion of skilled nursing facility care after a qualifying medical event | | LOCUS or CALOCUS acuity score required to access higher level of care | Equivalent acuity instrument required to access higher level of medical care | | Outlier audit triggered at 30 sessions per year for psychotherapy | Outlier audit triggered at 30 visits per year for physical therapy |

Action title for designer: "The parity gap is rarely subtle. When the behavioral column has a limitation and the medical column does not, the plan has a parity problem the comparative analysis must explain or correct."

The actual comparison depends on the specific classification in which the disputed benefit sits.

Exhibit 2: State parity-enforcement scorecard

DOL MHPAEA enforcement has historically concentrated on ERISA self-funded plans. Fully insured, non-ERISA group, and individual market plans are policed primarily by state Departments of Insurance, and state enforcement quality varies widely.

| State | Published parity-violation data | Dedicated parity-complaint channel | |---|---|---| | California | Yes, DMHC and CDI annual reports | Yes, DMHC Help Center and CDI Consumer Hotline | | New York | Yes, DFS market-conduct exams | Yes, DFS Consumer Help Unit | | Illinois | Yes, DOI parity compliance reports | Yes, DOI Consumer Services | | Massachusetts | Yes, DOI and AGO joint reporting | Yes, AGO Health Care Division | | Connecticut | Yes, CID parity reports | Yes, CID Consumer Affairs | | Washington | Yes, OIC parity reports | Yes, OIC Consumer Advocacy | | Oregon | Yes, DCBS parity reports | Yes, DFR Consumer Advocacy | | New Jersey | Partial, DOBI selected reports | Yes, DOBI Consumer Inquiry | | Pennsylvania | Partial, PID selected exams | Yes, PID Bureau of Consumer Services | | Maryland | Partial, MIA selected reports | Yes, MIA Consumer Complaints |

Action title for designer: "Ten states do meaningful parity enforcement against fully insured plans. In the other forty, the patient-led appeal, with the comparative-analysis request on the record, is the primary remedy."

In the ten states above, file the parity complaint with the state insurance commissioner in parallel with the internal appeal. In the other forty, the state complaint still belongs on the record but the appeal carries the load.

Exhibit 3: The comparative-analyses demand, in scope

A compliant demand for the comparative analysis identifies five categories: the analysis current as of the plan year of denial, any prior versions covering plan years from 2021 forward, the factors and evidentiary standards used to design each NQTL, any analyses prepared by third-party vendors, and the qualifications of the individuals who prepared the analysis. The demand cites 29 CFR 2590.712(d)(3) (or 45 CFR 146.136(c)(4) or 45 CFR 147.160, depending on plan type), the 2024 MHPAEA Final Rule at 89 Fed. Reg. 77586, and the 2024 implementation guidance from DOL, HHS, and Treasury. Production benchmark is 30 days from delivery. Apellica drafts this letter for every parity case the desk takes on. Plans miss the 30-day benchmark routinely. The missed deadline does not automatically settle the dispute, but it becomes a separate ground the appeal will assert.

Where to ask for help

The Department of Labor's Employee Benefits Security Administration, at askebsa.dol.gov, accepts MHPAEA complaints from ERISA participants and runs a benefits-advisor hotline at 1-866-444-3272. Enforcement has shifted toward technical assistance rather than penalty actions under the new administration, but complaint intake remains open and feeds the annual Report to Congress. CMS administers MHPAEA for non-ERISA group and individual market plans in states that have not assumed enforcement; complaints route through cms.gov. State DOIs handle enforcement for fully insured plans, indexed at content.naic.org/consumer.htm. The National Alliance on Mental Illness HelpLine at 1-800-950-NAMI provides one-on-one parity-rights navigation at no cost. The Kennedy Forum and the Kennedy-Satcher Center maintain a complaint-assistance template at parityregistry.org. The Legal Action Center, at lac.org, focuses on substance use disorder parity and confidentiality. Apellica, at apellica.com, prepares the comparative-analyses request and the downstream parity-grounded appeal in all 50 states with no upfront fee.

What to do if you have a behavioral health denial right now

The parity right has existed since 2008. The document right took effect with the 2025 plan year. The clock starts when the carrier dated the denial; most participants calendar the wrong day.

Most participants leave coverage on the table because the parity-grounded appeal is more procedural work than they can take on, especially while managing active treatment.

The Albany paralegal requested the carrier's comparative analysis for behavioral-health NQTLs. The document, when it arrived, did not address the disparity her two letters had documented in their margins. Her son's authorization moved to 32 hours per week on the second-level appeal.

How the desk takes on a case

Apellica prepares the comparative-analyses request letter and the downstream parity-grounded appeal for mental health and substance use disorder denials in all 50 states. The participant reviews and approves every word before submission and authorizes carrier communications under a HIPAA-compliant Assignment of Benefits. We are not a law firm, a medical provider, or an insurance carrier. We are an independent administrative service that turns a denied behavioral health claim into a properly documented parity appeal.

Our model is $0 upfront and a flat fee on successful recovery. If the appeal does not reverse, the participant owes nothing for the preparation work. Coverage extends to every ERISA self-funded plan, every ACA plan, every Medicare Advantage plan, and commercial coverage. A senior reviewer reads every case before it goes out.

About the author

Mark Henderson is a senior reviewer at Apellica (apellica.com), an independent insurance appeal preparation service headquartered at One World Trade Center, Suite 8500, New York, NY 10007. Apellica is not a law firm and does not provide legal advice. Coverage across all 50 states. Contact: press@apellica.com, +1 (888) 777-6120.

References

• Mental Health Parity and Addiction Equity Act of 2008, 29 USC 1185a.
• 29 CFR 2590.712. ERISA implementation of MHPAEA.
• 29 CFR 2590.712(d)(3). Comparative analyses of non-quantitative treatment limitations.
• 45 CFR 146.136. PHSA group market implementation of MHPAEA.
• 45 CFR 146.136(c)(4). Comparative analyses, group market.
• 45 CFR 147.160. Individual market implementation of MHPAEA.
• 45 CFR 147.136. Internal claims and appeals and external review.
• 29 CFR 2560.503-1. ERISA claims procedure.
• 89 Fed. Reg. 77586 (Sept. 23, 2024). Requirements Related to the Mental Health Parity and Addiction Equity Act; Final Rule.
• 42 USC 290dd-2. Confidentiality of substance use disorder patient records.
• 42 CFR Part 2. Confidentiality of substance use disorder patient records, implementing regulations.
• Wit v. United Behavioral Health, 2019 WL 1033730 (N.D. Cal. Mar. 5, 2019).
• Wit v. United Behavioral Health, 79 F.4th 1029 (9th Cir. 2023).
• Department of Labor, Department of Health and Human Services, and Department of the Treasury, 2024 MHPAEA Report to Congress.
• Department of Labor, Mental Health Parity and Addiction Equity Act Compliance Assistance Materials Index, 2023.
• Anthem autism therapy class settlement, Northern District of California, 2024 ($12.88 million).
• Department of Labor, Employee Benefits Security Administration. askebsa.dol.gov.
• Centers for Medicare and Medicaid Services. cms.gov.
• National Alliance on Mental Illness HelpLine. 1-800-950-NAMI. nami.org.
• Kennedy Forum and Kennedy-Satcher Center for Mental Health Equity. parityregistry.org.
• Legal Action Center. lac.org.
• NAIC Consumer Information Source. content.naic.org/consumer.htm.