Medicare Advantage vs Original Medicare for TMS
Both cover TMS for treatment-resistant depression. But the process is not the same.
Original Medicare (Parts A & B): TMS falls under Part B as an outpatient procedure. You pay 20% coinsurance after your deductible. Most claims don’t require prior authorization.
Medicare Advantage (Part C): Also covers TMS, but your MA plan sets its own rules — prior auth requirements, network restrictions, different cost sharing. All within CMS guidelines, but each plan is different.
Key differences
| Factor | Original Medicare | Medicare Advantage |
|---|---|---|
| Prior authorization | Usually not required | Often required |
| Network restrictions | Any Medicare-accepting provider | Must use plan’s network |
| Cost sharing | 20% coinsurance after deductible | Varies by plan (copay or coinsurance) |
| Referral needed | No | Some HMO plans require it |
| Annual out-of-pocket max | No limit on Part B | Required by law ($8,850 in 2026) |
That last row is worth noting. If you’ve already had big medical expenses this year, Medicare Advantage’s out-of-pocket cap could actually work in your favor for TMS.
Medicare Advantage authorization process
- Psychiatrist assessment documenting treatment-resistant depression
- Document medication failures — minimum 2 adequate trials from different classes
- Prior authorization submitted by your TMS clinic to your MA plan
- Timeline: 7-14 days for standard review; 72 hours if expedited
- Authorization typically covers a full 36-session course
Common Medicare Advantage plans that cover TMS
- UnitedHealthcare Medicare Advantage: Covered with prior auth
- Humana Gold Plus: Covered with specialist copay
- Aetna Medicare Advantage: Covered with prior auth
- Anthem Medicare Advantage: Covered with prior auth
- Cigna Medicare Advantage: Covered per plan terms
Cost for MA members
Typical out-of-pocket:
- Specialist copay plans: $30-$50 per TMS session
- Coinsurance plans: 20% of allowed amount per session
- Annual max applies: All TMS costs count toward your plan’s out-of-pocket limit
- Real example: 36 sessions x $40 copay = $1,440 total
Tips for Medicare Advantage members
- Verify network status before starting. Out-of-network TMS could cost 2-3x more — or not be covered at all
- Start prior auth early. MA plans can take longer to process than Original Medicare
- Keep detailed medication records. The more thorough your history, the smoother the authorization
- Check your out-of-pocket max. If you’ve already spent a lot on healthcare this year, TMS might be mostly covered
- Thinking about switching? Compare TMS coverage under both Original Medicare and MA during open enrollment
Related Insurance Guides
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How to Get TMS Approved
Call the number on the back of your insurance card and ask specifically about TMS therapy coverage. Get a reference number.
Gather records of your MDD diagnosis, all medication trials (names, doses, durations, outcomes), current PHQ-9 score, and therapy history.
Find an in-network TMS provider using our clinic directory. In-network clinics handle prior auth and know your insurer's requirements.
Your TMS clinic submits the prior auth request. Typical approval takes 5-15 business days. If denied, appeal — overturn rates are 60-70%.
What If You’re Denied?
Don't give up after a denial
TMS denial overturn rates are 60-70% on appeal. Steps to take:
- Request a peer-to-peer review — your psychiatrist talks directly to the insurer's medical director
- Submit additional documentation addressing the specific denial reason
- File a formal appeal with your state insurance department if internal appeals fail
- External review — most states allow independent external review of coverage denials
For more details, see our Prior Authorization Guide and Denied Coverage Appeals guide.