State Legality Does Not Change Federal Immigration Law

Marijuana is legal for recreational or medical use in many U.S. states, including California. However, marijuana remains a Schedule I controlled substance under federal law. Immigration law is federal law — and USCIS applies federal standards, not state law, when evaluating substance use.

This means that using marijuana legally under California law does not protect you from immigration consequences if your use meets the clinical criteria for cannabis use disorder. The civil surgeon evaluates your substance use under federal and clinical standards, regardless of state legality.

Casual Use vs. Cannabis Use Disorder

The immigration medical exam does not screen for whether you have ever used marijuana. It screens for whether you currently meet the DSM criteria for cannabis use disorder — a clinical diagnosis based on a pattern of problematic use that causes significant impairment or distress.

Casual or occasional marijuana use that does not meet those criteria is generally not a ground of inadmissibility. The civil surgeon will ask about your use patterns, frequency, quantity, and any negative consequences. If your use does not meet the diagnostic threshold, it will not result in a Class A inadmissibility finding.

What the Civil Surgeon Will Ask

The civil surgeon will ask about your marijuana use as part of the substance use screening. Expect questions about: how often you use, how much you use, whether you have tried to cut down, whether use has caused problems at work, school, or in relationships, and whether you have experienced withdrawal symptoms.

Answer honestly. The civil surgeon is a licensed physician conducting a clinical evaluation — not a law enforcement officer. Misrepresentation to a civil surgeon is a separate ground of inadmissibility (willful misrepresentation of a material fact) that can be far more damaging than the underlying substance use history.

Drug Testing at the Immigration Medical Exam

The standard immigration medical exam does not include a urine drug screen for marijuana. The civil surgeon evaluates substance use through a clinical interview, not routine drug testing. However, if the civil surgeon has clinical reason to suspect a substance use disorder, they may order laboratory testing.

If you have a positive drug test from another context (a prior employer, a court-ordered test, or a prior medical record), that information may be relevant if it is part of your medical history that the civil surgeon reviews.

Medical Marijuana and the Exam

Using marijuana for a documented medical condition — with a physician's recommendation — does not exempt you from the immigration medical exam's substance use screening. The civil surgeon evaluates the pattern of use and whether it meets the clinical criteria for cannabis use disorder, regardless of whether the use is for medical purposes.

If you use medical marijuana, disclose this to the civil surgeon along with the underlying medical condition for which it is prescribed. The civil surgeon will evaluate the full clinical picture.

If Cannabis Use Disorder Is Found

If the civil surgeon determines that you currently meet the criteria for cannabis use disorder, they will make a Class A inadmissibility finding on Form I-693. A waiver under INA § 212(g) may be available. The waiver process requires demonstrating that the disorder is being treated and is under control. See the related articles on medical waivers for more information.