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Ketamine therapy for treatment-resistant depression

What the evidence shows for ketamine in treatment-resistant depression, who is a candidate, what a course looks like, and why it is usually cash pay.

Reviewed by Covered Mind clinical editorial team · Sep 1, 2026

Why ketamine is used here

Most ketamine trials enrolled people with treatment-resistant depression, and the response rates in that population (50 to 70 percent for an initial series) are what made ketamine notable. It works through a different mechanism than antidepressants, so prior medication failures do not predict ketamine failure. See the coverage hub, the ketamine therapy hub, and the coverage checker.

When clinicians choose ketamine over Spravato

When a patient does not meet Spravato's insurance criteria, cannot take an oral antidepressant, has been denied, or when a ketamine clinic is nearer or cheaper for them. Some clinicians also prefer IV dosing for its adjustability.

What treatment looks like

Six infusions over two to three weeks, then boosters at increasing intervals. A rating scale before and after the series tells you and the clinic whether to continue.

Coverage and cost

Not covered by insurance. Cash prices run $350 to $850 per infusion. See ketamine therapy cost and compare with Spravato for TRD.

Reviewed by Covered Mind clinical editorial team · Sep 1, 2026 · Editorial policy

Cite this

Covered Mind. "Ketamine therapy for treatment-resistant depression." https://web-three-tan-98.vercel.app/conditions/treatment-resistant-depression/ketamine-therapy. Reviewed Sep 1, 2026.

This site provides general information about insurance coverage and treatment options. It is not medical advice, not a guarantee of coverage, and not a substitute for talking with a clinician or your health plan.