Medicare's Coverage of Transcranial Magnetic Stimulation

Medicare covers transcranial magnetic stimulation (TMS) for treatment-resistant depression, but only under specific conditions. The treatment must be performed by a psychiatrist or other may have access to physician, the patient must have failed at least one antidepressant medication trial, and the procedure must take place in an outpatient setting. Medicare Part B pays 80 percent of the approved amount after you meet your deductible; you pay the remaining 20 percent coinsurance.

TMS is a non-invasive procedure that uses magnetic pulses to stimulate nerve cells in the brain. It is typically used when medications alone have not worked. Medicare's coverage is limited to depression — it does not cover TMS for other conditions like anxiety, bipolar disorder, or chronic pain, even though some research suggests it may help with those conditions.

Key Takeaways

  • Medicare Part B covers TMS for treatment-resistant depression only when performed by a may have access to physician in an outpatient setting.
  • You must have tried and failed at least one antidepressant medication before Medicare will cover the procedure.
  • You pay 20 percent coinsurance after your Part B deductible is met; the exact out-of-pocket cost depends on the number of sessions and your provider's billing amount.
  • Your doctor must document the failed medication trial and submit the treatment plan to Medicare for review before the procedure begins.
  • TMS for conditions other than treatment-resistant depression is not covered by Medicare, though some Medigap or Medicare Advantage plans may offer different coverage.

What Documentation You Need Before Treatment

Your doctor must gather and submit specific paperwork to Medicare before TMS can begin. This includes medical records showing at least one adequate trial of an antidepressant medication — "adequate" means you took the drug at a therapeutic dose for at least four weeks. The records should show the specific medication name, dosage, dates of treatment, and why it was discontinued or deemed ineffective.

Your psychiatrist or physician will also need to document your diagnosis of major depressive disorder and explain why TMS is medically necessary in your case. This documentation goes to Medicare as part of a prior authorization request. Medicare typically responds within 10 to 14 business days, though the timeline can vary. Do not schedule your first TMS session until you receive written approval from Medicare.

How the Cost Breaks Down

A typical TMS course involves 20 to 30 sessions over four to six weeks. Each session costs between $300 and $500 before insurance, though the amount Medicare allows varies by region and facility. After you meet your Part B deductible (which is $240 in 2024, though this amount changes yearly), Medicare pays 80 percent and you pay 20 percent coinsurance for each session.

If you have a Medigap policy, it may cover some or all of your 20 percent coinsurance, depending on which plan you hold. If you have a Medicare Advantage plan instead of Original Medicare, your coverage and costs will differ — contact your plan directly to learn what it covers for TMS. Some facilities offer payment plans if your out-of-pocket costs are high.

When Medicare Denies Coverage

Medicare denies TMS coverage most often when the patient has not completed an adequate antidepressant trial first. "Adequate" means at least four weeks at a therapeutic dose; taking a medication for two weeks or at a low dose does not meet this standard. If your denial letter cites insufficient medication trial, you can work with your doctor to complete a proper trial and resubmit.

Medicare also denies coverage if TMS is being used for a condition other than treatment-resistant depression — such as anxiety, bipolar disorder, or pain. In these cases, the procedure is considered experimental for that condition. Some Medicare Advantage plans have different rules and may cover TMS for other diagnoses, so check your plan documents or call your plan's customer service line.

Medicare Advantage Plans and TMS Coverage

Medicare Advantage plans (Part C) set their own coverage rules and may cover or exclude TMS differently than Original Medicare does. Some plans cover TMS for treatment-resistant depression under the same conditions as Original Medicare. Others may have stricter requirements, such as requiring a second psychiatric opinion or a longer medication trial. A few plans may cover TMS for conditions beyond depression.

If you have a Medicare Advantage plan, call the customer service number on your insurance card and ask specifically about TMS coverage: what conditions are covered, whether prior authorization is required, and what your coinsurance or copay will be. Get the answer in writing if possible. If you are considering switching plans during open enrollment, TMS coverage should be one factor in your decision.

What Happens If You Have a Medigap Plan

Medigap policies do not cover TMS directly — instead, they cover the coinsurance and deductibles that Original Medicare leaves you responsible for. If you have Original Medicare plus a Medigap plan, Medicare pays 80 percent of the approved TMS cost, and your Medigap plan typically covers the remaining 20 percent coinsurance (depending on which Medigap plan you hold). This means you may have little or no out-of-pocket cost for the procedure itself.

Plans C, D, G, and M offer the most comprehensive coverage of Medicare coinsurance. Plans K and L cover a percentage rather than the full amount. Check your Medigap policy documents or call your Medigap insurer to confirm what percentage of coinsurance your plan covers. If you do not have a Medigap plan and are concerned about the 20 percent coinsurance cost, you can ask your TMS facility about payment plans or financial hardship programs.

The Prior Authorization Process Step by Step

Your doctor's office handles most of the prior authorization work, but understanding the steps helps you track progress and catch delays. First, your psychiatrist or physician documents your depression diagnosis and the failed antidepressant trial in your medical record. Second, the office submits a prior authorization request to Medicare, including the medical records, the TMS treatment plan, and the facility's billing information.

Medicare reviews the request and sends a decision letter to your doctor's office and to you. If approved, the letter will state the number of sessions covered and any conditions (such as a requirement for follow-up psychiatric visits). If denied, the letter explains the reason and your right to appeal. You have 120 days from the denial date to file an appeal. Do not begin TMS until you have received written approval.

Frequently Asked Questions

Does Medicare cover TMS for anxiety or bipolar disorder?

No. Medicare covers TMS only for treatment-resistant depression. TMS for anxiety, bipolar disorder, or other conditions is considered experimental and is not covered. Some Medicare Advantage plans may have different policies, so contact your plan if you have one.

What if I tried an antidepressant for only two weeks before stopping it?

Medicare requires at least four weeks at a therapeutic dose. If you stopped early, your doctor can prescribe the medication again (or a different one) and have you take it for the full four weeks. Once that trial is documented, you can resubmit for prior authorization.

Will my Medigap plan pay the 20 percent coinsurance for TMS?

Most Medigap plans cover coinsurance, but the amount varies by plan. Plans C, D, G, and M typically cover the full 20 percent. Plans K and L cover a percentage. Check your policy or call your Medigap insurer to confirm.

How long does prior authorization take?

Medicare typically responds within 10 to 14 business days. However, if your doctor's office needs to gather additional medical records or clarification, the process may take longer. Ask your doctor's office for a timeline when they submit the request.

Can I appeal if Medicare denies my TMS coverage?

Yes. You have 120 days from the denial date to file an appeal. Your doctor's office can help you gather additional documentation to support the appeal, such as detailed notes about why the antidepressant trial was adequate or why TMS is medically necessary in your case.