Yes, you can appeal a TMS denial, and many denials are fixable. In New York there are usually two stages: an internal appeal to your health plan, then an external appeal decided by independent reviewers through the Department of Financial Services (DFS). New York's DFS consumer guide gives you 180 days to file the internal appeal, and you then have 4 months from the plan's final denial to request an external appeal. Those rules apply to plans regulated by New York State. Self-funded employer plans and Medicare follow different rules, so the first job is to find out which kind of plan you have.
The second job is to read the denial letter closely. A denial for a missing medication date is a paperwork problem. A denial because your plan calls the protocol "experimental" is a policy problem. The two call for very different appeals.
Read the denial letter first: what kind of "no" is it?
Your plan must send a written notice when it denies treatment, and the notice should say why and how to appeal. Match the reason to one of the rows below before you write anything.
| Reason on the letter | What it usually means | Strongest response |
|---|---|---|
| Not medically necessary / criteria not met | The reviewer did not find proof of something the policy requires, such as enough medication trials, a psychotherapy trial or a baseline rating scale. | Send the missing records, matched point by point to the policy's own criteria. |
| Experimental or investigational | The plan's policy excludes the protocol or condition, for example accelerated TMS, maintenance sessions or OCD under some policies. | Harder. Ask whether a standard course would be covered; if you still want to appeal, an external appeal is available for this type of denial. |
| Out-of-network | The plan will not pay, or will pay less, because the TMS team is outside its network. | Show that no in-network provider can meet your needs, or switch to an in-network team. See how out-of-network TMS claims work. |
| Administrative (missing form, wrong code, no prior authorization) | A process step was skipped. | Often fixed by a corrected resubmission rather than a formal appeal. Ask the plan which route it wants. |
Which appeal rules apply to your plan
New York's appeal protections cover individual plans bought in New York and group policies an employer buys from a New York insurer. They do not cover self-funded employer plans, even when a well-known insurer processes the claims; DFS says plainly that "New York protections don't apply" to that coverage. Ask your HR office or call the member services number on your card and ask: "Is my plan fully insured or self-funded?"
| Plan type | Internal appeal | Independent review |
|---|---|---|
| New York fully insured plan (individual or employer-bought) | With the plan, under New York Insurance Law | NY DFS external appeal |
| Self-funded employer plan | With the plan, under federal rules (your denial letter states the deadline) | External review under federal rules, as described in your denial letter; HealthCare.gov's guidance gives 4 months after the final notice to file |
| Medicaid, Medicaid Managed Care, Essential Plan, Child Health Plus | With the plan; New York protections apply with different rules | NY external appeal, with the fee waived for Medicaid and Child Health Plus |
| Original Medicare | Redetermination, the first of 5 appeal levels; file by the date on your Medicare Summary Notice | A Qualified Independent Contractor reviews at level 2 |
| Medicare Advantage | With the plan, following the plan's notice | Medicare's appeal system, not DFS |
For Medicare in particular, New York's policy is LCD L33398, version 40, effective August 9, 2026, and Medicare Advantage plans must follow that local policy rather than invent stricter criteria where Medicare's are fully established. The physician's guide to Medicare TMS coverage in New York walks through it line by line.
Step 1: Get the exact policy your plan used
You have the right to ask your plan for a copy of the clinical review criteria it used to deny you, and New York law requires plans to make their mental health medical-necessity criteria available on request. Ask for the policy by name, number and revision date. The criteria differ more than most people expect.
- Aetna uses Clinical Policy Bulletin 0469 (last review July 17, 2026). For adults it asks for two antidepressants from at least two classes, each for at least 8 weeks, plus at least 8 weeks of augmentation, but no psychotherapy trial.
- Cigna/Evernorth uses EN0383 (effective March 15, 2026). It counts a medication trial after at least four weeks and does require a psychotherapy trial in the current episode.
- UnitedHealthcare/Optum uses Optum Behavioral Clinical Policy BH803TMS112025 (interim review April 21, 2026), which dropped its psychotherapy requirement in 2023.
- Medicare in New York (L33398, revision effective August 9, 2026) requires a failed trial of evidence-based psychotherapy documented with standardized rating scales.
- NYS Medicaid (Medicaid Update, volume 41, number 7) defines treatment resistance as two therapeutic-dose trials of two different antidepressants.
- Anthem (formerly Empire BCBS) said in its 2024 provider notice that it reviews TMS with the proprietary MCG guideline B-801-T, 28th edition (effective September 1, 2024). The guideline is not public and a newer edition may now apply, so ask the plan for the current criteria in writing.
These are the versions verified on October 7, 2026. Payers revise these policies, sometimes several times a year, so confirm the current version with your plan before you rely on any of them. The guide to how many medications each plan requires compares the medication rules side by side.
Step 2: Ask for a peer-to-peer review
Many plans let the ordering psychiatrist speak directly with the plan's physician reviewer after a denial, before a formal appeal. This call is often the fastest fix when the denial turns on a judgment call, such as whether a medication trial was "adequate" or whether side effects counted as intolerance. Plans set their own windows for requesting one, so the TMS team should ask as soon as the denial arrives.
A good peer-to-peer is short and specific: the diagnosis, the baseline score, each medication trial with dose and duration, the psychotherapy history if the policy requires it, and the exact policy sentence the patient meets. If the reviewer upholds the denial, the conversation still tells you what the written appeal needs to prove.
Step 3: File the internal appeal
Deadlines and decision times in New York
- Your deadline: DFS's consumer guide says you have 180 days to appeal with your insurer; the statute sets a floor of no less than 45 days, so check the date on your own letter.
- Standard appeal: decided within thirty days of receipt.
- Expedited appeal: decided within two business days of receipt of the necessary information. Ask for expedited review if waiting would seriously harm your health.
- Who decides: a clinical peer reviewer who did not make the first decision; for mental health, New York requires that reviewer to specialize in behavioral health.
The gaps that sink most TMS requests
Most medical-necessity denials come down to documentation that exists somewhere but never reached the reviewer. Check each of these against your plan's policy:
- Medication trials: drug names, doses, start and stop dates, and why each ended. A trial stopped at three weeks may not count under Aetna's 8-week rule, while Cigna counts four weeks.
- Intolerance: Medicare and Cigna accept documented intolerance in place of a failed trial, so record side effects when they happen.
- Baseline severity: a validated scale score. Aetna names scales such as the BDI, HDRS or MADRS and expects the same scale throughout the course. The guide to PHQ-9 and other scales explains them.
- Timing: Aetna requires the criteria to be met during the current episode within the past 5 years.
- Repeat courses: Aetna treats a new course within 60 days of the last one as not medically necessary.
The step-by-step guide to TMS prior authorization lists the full document set; an appeal packet is largely the same set, assembled more carefully.
A sample appeal letter outline
Your psychiatrist usually writes the clinical letter. You can add a short letter of your own about how depression affects your work, family and safety. A strong clinical letter follows this order:
- Header: your name, member ID, claim or reference number, date of the denial, and the words "Request for internal appeal" (or "expedited").
- The request: one sentence naming the service (for example, an initial course of TMS for major depressive disorder) and asking the plan to reverse the denial.
- The policy: the policy name, number and revision date the plan cited, quoted exactly.
- Criterion by criterion: each requirement in the policy, followed by the evidence that it is met and a pointer to the attached record.
- Medication table: drug, class, dose, dates, outcome (no response, partial response, intolerance and what it was).
- Psychotherapy history, if the policy requires it: type, dates, frequency, and scale scores before and after.
- Safety screening: a statement that contraindications in the policy were reviewed.
- Clinical judgment: why TMS is the appropriate next step for this patient now, and what the alternatives would be.
- Attachments list and the psychiatrist's signature and contact details.
Keep a copy of everything you send, note the date and how it was sent, and write down the name of every person you speak with at the plan.
Step 4: Request a New York external appeal
If the plan upholds its denial, a New York external appeal sends the case to medical experts independent of your insurer. It is available when the plan says care is not medically necessary, experimental or investigational, or out-of-network.
- Deadline: 4 months from the date of the final adverse determination; providers filing on their own behalf have 60 days. If your plan offers a second internal level, you do not have to use it, but the 4 months still runs from the first appeal decision.
- Cost: up to $25 per appeal and no more than $75 in a plan year, waived for Medicaid and Child Health Plus and for hardship, and refunded if you win.
- Decision time: 30 days standard, 72 hours expedited.
- How to file: online through the DFS external appeal page (preferred), by email, by fax to (800) 332-2729, or by mail to 99 Washington Avenue, Box 177, Albany, NY 12210.
- Forms: a patient consent form for medical records, and for some appeal types a physician attestation with an actual signature. For an experimental or investigational denial, the physician must attest that standard health services "have been ineffective or would be medically inappropriate."
Under federal rules, a plan must accept the external reviewer's decision.
Parity arguments: when they help
New York's parity law bars group plans from applying financial requirements or treatment limits to mental health benefits that are more restrictive than those applied to substantially all medical and surgical benefits. Federal parity law still applies too: in May 2025 the federal agencies paused enforcement only of the parts of the 2024 rule that were new, while the statute, the 2013 rule and existing guidance "continue to have effect."
A parity argument is worth making when the plan's process for TMS is visibly harsher than for comparable medical care: unusually frequent re-reviews, a session cap with no medical basis, or paperwork demands it does not make of, say, physical therapy. It is a weaker tool against a policy that has reviewed the evidence and calls a specific protocol experimental. In that case, the external appeal is the more realistic route. The physician's guide to New York parity law and TMS claims covers the legal detail.
When an appeal is unlikely to succeed
Some denials follow the written policy exactly. Aetna, Cigna and Optum all list accelerated TMS protocols as experimental or unproven, and Medicare, Aetna and Cigna exclude maintenance TMS. If that is your situation, the practical options are usually a standard daily course the plan does cover, a different treatment, or paying yourself. See whether accelerated TMS is covered and what TMS costs without insurance.
A denial is also a useful moment to step back with your psychiatrist. TMS is not the right next step for everyone, and the general overview of insurance coverage for TMS and the TMS guide describe the other options.
Free help in New York
- Community Health Advocates, New York's consumer insurance advocacy program: (888) 614-5400.
- CHAMP, the independent behavioral health ombudsman program, can help file an appeal with your insurer: (888) 614-5400 or ombuds@oasas.ny.gov.
- DFS answers questions at (800) 342-3736 and takes complaints if your plan never sent a denial notice.
- Medicare questions go to 1-800-MEDICARE or the Medicare Rights Center at (800) 333-4114.
If you are planning treatment, the TMS therapy page explains how to start a conversation about whether TMS fits your situation. The DFS consumer guide to mental health coverage is a useful short reference to keep with your appeal file.
Sources
- File an External Appeal. New York State Department of Financial Services, 2026. dfs.ny.gov
- Health Insurance Coverage Information for Mental Health and Substance Use Disorder Treatment. New York State Department of Financial Services, 2025. dfs.ny.gov
- NY Insurance Law Sec. 4904 (Appeal of adverse determinations by utilization review agents). New York State Senate, 2026. nysenate.gov
- NY Insurance Law Sec. 3221 (group mental health coverage). New York State Senate, 2026. nysenate.gov
- Appeals in Original Medicare. Medicare.gov (CMS), 2026. medicare.gov
- External review. HealthCare.gov (CMS), 2026. healthcare.gov
- LCD L33398 Transcranial Magnetic Stimulation (version 40). Wellpoint Federal, CMS Medicare Coverage Database, 2026. cms.gov
- 2024 Medicare Advantage and Part D Final Rule (CMS-4201-F) fact sheet. Centers for Medicare & Medicaid Services, 2023. cms.gov
- Transcranial Magnetic Stimulation and Cranial Electrical Stimulation (Clinical Policy Bulletin 0469). Aetna, 2026. aetna.com
- Transcranial Magnetic Stimulation (Coverage Policy EN0383). Evernorth Health Services (Cigna), 2026. a.static.cigna.com
- Behavioral Clinical Policy: Transcranial Magnetic Stimulation (BH803TMS112025). Optum Behavioral Health Solutions, 2026. providerexpress.com
- New York State Medicaid Coverage of Therapeutic Transcranial Magnetic Stimulation (Medicaid Update, volume 41, number 7). New York State Department of Health, 2025. healthweb-back.health.ny.gov
- MCG Care Guidelines 28th edition (Anthem NY provider news). Anthem Blue Cross and Blue Shield (New York), 2024. providernews.anthem.com
- Statement Regarding Enforcement of the Final Rule on Requirements Related to MHPAEA. U.S. Department of Labor (EBSA), HHS and Treasury, 2025. dol.gov
FAQs
How long do I have to appeal a TMS denial in New York?
For a New York-regulated plan, the DFS consumer guide says 180 days for the internal appeal with your insurer, and the law sets a floor of 45 days, so check the date on your letter. After the plan's final denial you have 4 months to request an external appeal from DFS. Self-funded employer plans and Medicare have their own deadlines, stated on the denial notice.
Should I start TMS while the appeal is pending?
Only if you accept that you may have to pay for the sessions if the appeal fails. Ask the TMS team for a written estimate first, and ask your plan whether an expedited appeal is possible.
Can my psychiatrist file the appeal for me?
Usually. Ask your plan what signed authorization it needs for your provider to appeal on your behalf. Providers filing a New York external appeal on their own behalf have 60 days instead of 4 months.
What if my employer plan is self-funded?
New York's appeal protections do not apply. You still have an internal appeal under federal rules and usually an independent external review. Your denial letter should describe those steps and deadlines; HR or the plan administrator can confirm.
Does winning an appeal cover the whole course?
It covers what was requested and approved. If the plan approved a set number of sessions, ask in writing how many, over what dates, and what is needed to request more.
