Medicare covers one specific form of ketamine, a nasal spray called Spravato (esketamine), for treatment-resistant depression. Standard IV ketamine infusions, the kind offered at many private clinics, have no Medicare coverage determination and are generally not covered. The distinction between these two forms matters enormously for your wallet.
What Medicare Actually Covers
Spravato, the FDA-approved nasal spray form of esketamine, is covered under Medicare Part B as an outpatient medical service. It is approved for two specific uses: treatment-resistant depression in adults (meaning you’ve tried other antidepressants without adequate relief) and depressive symptoms in adults with major depressive disorder who have suicidal thoughts or actions. In both cases, it must be prescribed alongside an oral antidepressant.
Because this is a Part B benefit, standard cost-sharing applies. After you meet your annual Part B deductible, you typically pay 20% of the Medicare-approved amount for each treatment session. If you have a Medigap (supplemental) policy, it may cover some or all of that 20%. The total cost per session before insurance can be significant, so even 20% adds up over a course of treatment that spans weeks to months.
IV Ketamine Is a Different Story
IV ketamine infusions, the type most commonly advertised by private ketamine clinics, are not FDA-approved for depression or most psychiatric conditions. They use a different chemical form (racemic ketamine) delivered intravenously rather than as a nasal spray. There are currently no Medicare coverage determinations for IV ketamine used to treat depression. Without a national or local coverage policy, these claims fall into a gray zone where they are typically denied.
Some patients and providers have attempted to get IV ketamine covered on a case-by-case basis, but the absence of a formal coverage pathway makes this unreliable. In practice, most people paying for IV ketamine infusions at private clinics are paying entirely out of pocket, often $400 to $800 per session.
How Spravato Treatment Works Under Medicare
Spravato isn’t something you pick up at a pharmacy and take at home. The FDA requires it to be administered in a certified healthcare setting through a restricted safety program called REMS. Both the clinic and the pharmacy dispensing the medication must be formally certified, and you must be enrolled in the program before your first dose.
Each session follows the same basic pattern: you arrive at the certified clinic, self-administer the nasal spray under supervision, and then stay for at least two hours of monitoring. Staff check your vital signs and watch for side effects like dissociation, dizziness, or changes in blood pressure. You cannot drive yourself home afterward.
The treatment schedule is front-loaded. During the first month, you’ll go twice a week (up to eight sessions). In the second month, frequency drops to once a week (up to four sessions). From the third month onward, sessions taper to every one or two weeks depending on how you respond. The goal is to find the least frequent schedule that keeps your symptoms in check. If a provider bills more sessions than the FDA label supports, those claims may trigger a medical review.
Medicare Advantage Coverage Varies Widely
If you have a Medicare Advantage plan (Part C) rather than Original Medicare, coverage for Spravato is far less predictable. Research analyzing Medicare Advantage formularies found that only about 36.5% of total enrollment is in plans that explicitly cover Spravato. Of those, the vast majority require prior authorization before treatment can begin. Roughly 3% of enrollees are in plans that cover it without prior authorization.
The remaining 63.5% of Medicare Advantage enrollees are in plans where Spravato coverage is simply not stated in policy documents. That silence doesn’t mean automatic coverage. In practice, when a plan’s policy is silent on a treatment, it functions as a barrier. Claims get pushed into case-by-case review, where approval depends on documentation quality, the individual reviewer’s discretion, and your willingness to appeal denials. Many patients abandon the process before getting a clear answer.
If you’re in a Medicare Advantage plan and considering Spravato, call your plan directly and ask whether it’s covered, what prior authorization is needed, and which nearby facilities are certified to administer it. Getting this in writing before starting treatment can save you from surprise bills.
What About Ketamine for Pain?
Ketamine is sometimes used in pain management settings for conditions like complex regional pain syndrome or other chronic pain syndromes. Medicare does not have a broad national coverage policy for ketamine infusions used for pain. Coverage decisions, when they exist, happen at the local level through regional Medicare contractors and vary by geography. If your provider recommends ketamine for pain, ask them to verify coverage with your specific Medicare contractor before scheduling treatment. Without advance confirmation, you risk being responsible for the full cost.
Steps to Check Your Coverage
- Original Medicare (Parts A and B): Spravato for treatment-resistant depression is a covered Part B benefit when administered at a REMS-certified facility. IV ketamine is not covered under any standard pathway.
- Medicare Advantage (Part C): Call your plan’s member services line and request a coverage determination for Spravato before beginning treatment. Ask specifically about prior authorization requirements and any step therapy (trying other treatments first) your plan mandates.
- Medigap plans: These supplement Original Medicare and may reduce your 20% coinsurance for Spravato, depending on the plan type you purchased.
- Part D (prescription drug plans): Spravato is not dispensed through retail pharmacies, so Part D does not apply. It is billed as a medical service under Part B.
The manufacturer of Spravato also operates a patient assistance program that may help with copays for eligible Medicare beneficiaries, though restrictions apply. Your prescribing clinic’s billing department can usually help you navigate this.