Ketamine clinics sit in a frustrating gap. The treatment is mainstream, evidence-backed, and delivered by licensed providers, but the payment system still treats it like contraband. Plenty of processors will accept a ketamine practice. The trick is knowing which kind to approach and how to present your clinic so it gets a yes instead of an automated decline.
Legal and approved, but auto-declined
Ketamine is an FDA-approved Schedule III medication. Esketamine (Spravato) carries an explicit FDA approval for treatment-resistant depression, and racemic ketamine is widely used off-label for depression, anxiety, PTSD, and chronic pain, which is a legal and common practice in medicine. None of that is in dispute.
So why the declines? Payment aggregators like Stripe and Square do not underwrite individual merchants. They run automated risk models, and those models treat anything controlled-substance-adjacent, pharma-adjacent, or telemedicine-prescribing as high-risk by default. The model cannot read your medical license or distinguish a clinic from a pill mill, so it declines or, worse, boards you and then freezes the account once volume appears. The problem is risk classification, not legality.
What underwriters actually look for
A specialized high-risk acquirer will approve a ketamine clinic, but it underwrites the practice first. Expect them to evaluate:
Licensing and credentials. Medical license, DEA registration where applicable, state facility or clinic registration, and the prescribing provider's standing. For multi-state telehealth, licensure in each state you treat patients.
Clean, accurate marketing. No miracle-cure language, no guaranteed outcomes, no claims the FDA would object to. Your site should describe the service plainly, name the conditions you treat truthfully, and avoid disease claims you cannot support.
Financial and dispute history. Processing statements if you have them, chargeback ratio, and whether you have ever been terminated or placed on MATCH. A prior freeze is not automatically fatal, but it must be disclosed and addressed.
Policy infrastructure. A clear refund and cancellation policy, terms of service, privacy policy, informed consent, and a contact method. These reduce disputes and signal a real, compliant business.
MCC, descriptor, and documentation
Three technical details decide whether your account stays healthy. First, the merchant category code (MCC) must reflect what you really are, typically a medical-services or health-practitioner classification, not a generic retail code. The wrong MCC is a slow-motion termination: it works until a risk review notices the mismatch.
Second, the billing descriptor, the text on the cardholder's statement, must clearly match your clinic's public name and include a working phone number. Descriptor mismatch is one of the largest single causes of "friendly fraud" chargebacks, because patients dispute charges they do not recognize.
Third, have your documentation assembled before you apply: licenses, articles of incorporation, a voided check or bank letter, recent processing statements, and your policy pages. A complete file is what lets an underwriter say yes quickly instead of sitting in pending.
Brick-and-mortar vs telehealth
An in-clinic infusion practice with card-present terminals is the easier approval: the cardholder is physically present, the service is observable, and chargeback risk is lower. Telehealth and at-home ketamine programs are still approvable but underwritten more conservatively, because the card is not present, the prescriber relationship is remote, and dispute exposure is higher. Telehealth applicants should expect closer scrutiny of multi-state licensing and intake flow, and possibly a modest reserve at the start. Either model works with the right acquirer; they are simply different risk profiles.
How to get approved, and stay approved
Approach the right kind of processor. Skip aggregators entirely. You want a high-risk acquiring bank or a broker who places ketamine clinics specifically and knows which acquirers say yes.
Apply once, with a clean file. Each decline is a small mark. A pre-audited, complete application avoids the loop of declines that hardens into a reputation problem.
Keep chargebacks under control. Use a matching descriptor, send clear receipts, enforce your cancellation policy, and consider chargeback alerts. Staying under network thresholds is what keeps the account open long-term.
Build in redundancy. A backup processing rail means a single freeze or review cannot take your whole clinic offline. For a high-risk vertical, this is insurance worth having.
If you run a ketamine clinic, start with our free readiness audit. We will tell you exactly where your application is strong and where it is at risk before any acquirer sees it. For full detail on our setup for this vertical, see ketamine clinic payment processing.