That is also where ketamine treatment and ketamine addiction begin to intersect. We once had two easily recognized categories: ketamine administered medically and ketamine obtained on the street. A 2026 study identified 233 clinics advertising ketamine treatment in metropolitan New York. If ketamine use is suspected, a urine test for ketamine and norketamine must be ordered. Medical Ketamine Is DifferentCarefully supervised ketamine treatment should never be confused with chronic, high-dose recreational use.