Key West Cannabis Clinic is a medical marijuana certification clinic in Key West. The office is at 1805 Staples Avenue, Suite 104, Key West, Florida 33040, between George and 1st Streets. It is part of the Iona Cannabis Clinic group and certifies qualifying patients for the state program; the clinic sells no cannabis.

Evaluations are performed by Dr. Gregory Sonn, who is board-certified in family practice and palliative care and founded the Iona Cannabis Clinic group. Key West is the group’s southernmost office, serving the Florida Keys.

Florida requires a qualifying condition and a physician’s certification before a patient can register for a medical marijuana card. After certification, the clinic submits the state application, and patients can purchase from licensed Florida dispensaries once approved. Office visits are by appointment only, booked by phone or through the clinic’s website.

Staples Avenue sits near Key West’s cluster of medical offices, off North Roosevelt Boulevard. The clinic serves patients throughout the Lower Keys, from Key West to Marathon and Big Pine Key. Key West anchors the southern end of US-1 and the Overseas Highway, about 160 miles from Miami.

Who is Key West Cannabis Clinic for?

Florida residents in Monroe County and the Lower Keys — Key West, Big Pine Key, and Marathon — who have a qualifying condition and want a physician’s certification for the state medical marijuana program.

Who is the physician?

Dr. Gregory Sonn, board-certified in family practice and palliative care and founder of the Iona Cannabis Clinic group, oversees the Key West office and performs evaluations.

How do appointments work?

Office visits are by appointment only. Patients can request an appointment by phone at (305) 330-4701 or through keysmedcards.com, then complete the state application after certification.

Key West Cannabis Clinic — Key West Phone: (305) 330-4701 Address: 1805 Staples Ave, Suite 104, Key West, FL 33040 Hours: By appointment only (weekday booking) Services: Florida medical marijuana certifications, renewals, and state Registry application assistance Physician: Dr. Gregory Sonn (board-certified, family practice and palliative care; founder, Iona Cannabis Clinic group) Nearby neighborhoods served: Key West FL, Stock Island FL, Big Pine Key FL, Marathon FL, Monroe County FL Last verified: June 2026 Notes: Florida medical marijuana certification clinic (not a dispensary); the Key West location of the Iona Cannabis Clinic group; office visits by appointment only; located on Staples Avenue off North Roosevelt Boulevard. No Google rating is published for this office at the time of listing. Website: keysmedcards.com