Key takeaway: The word your physician uses matters legally. In nearly every U.S. state, doctors issue a recommendation or certification — not a prescription — for medical marijuana.
Under the federal Controlled Substances Act, physicians may only write prescriptions for substances with accepted medical uses — Schedules II through V. Marijuana is currently Schedule I, which means it officially has no accepted medical use under federal law. Writing a federal prescription for marijuana carries severe penalties, including revocation of the physician's DEA registration. In 2002, Conant v. Walters confirmed physicians have a First Amendment right to recommend cannabis but cannot prescribe it.
A medical marijuana recommendation is a written certification from a licensed physician that you have a qualifying condition under state law. It allows you to apply for a state medical marijuana card and purchase cannabis at a licensed dispensary. A federal prescription is for FDA-approved drugs dispensed at licensed pharmacies. Marijuana is not FDA-approved, so it cannot be federally prescribed.
Recommendation (California, Colorado), Certification (Florida, New York, Pennsylvania), Written statement or authorization (some states), Physician statement (CBD-only states), Prescription (Texas Compassionate Use Program only — a state-specific framework, not a federal prescription).