Iona Cannabis Clinic runs its flagship medical marijuana certification office on McGregor Boulevard in south Fort Myers. Dr. Gregory R. Sonn sees patients at 15620 McGregor Boulevard, Suite 100, Fort Myers, Florida 33908. He certifies qualifying patients for the state program, and the clinic sells no cannabis. The office anchors the Iona area that gives the practice its name, near the Sanibel causeway.

Dr. Sonn is the clinic’s founder and chief medical officer, dually board-certified and among the region’s first full-time medical-cannabis physicians. Iona Cannabis Clinic is independent and physician-led, not a corporate network. It’s the original of three ICC offices in Southwest Florida, with Port Charlotte and Bonita Springs the others.

Florida requires a qualifying condition and a physician’s certification before a patient can register for a card. The clinic handles new certifications and renewals, with the first visit in person as the state requires. Weekday hours run 9:00 AM to 4:00 PM, and weekends are closed.

McGregor Boulevard is Fort Myers’ historic royal-palm corridor, running southwest toward Sanibel and Captiva. Patients come from south Fort Myers, Cypress Lake, Fort Myers Beach, and the islands. Summerlin Road and McGregor keep the office close to the beaches and the Cape Coral bridge.

Who is Iona Cannabis Clinic in Fort Myers for?

Florida residents across south Lee County — Fort Myers, Cypress Lake, Fort Myers Beach, and the Sanibel area — seeking a physician’s certification for the state medical marijuana program.

Who is the doctor?

Dr. Gregory R. Sonn, the clinic’s founder and chief medical officer, leads the practice. He’s dually board-certified and among the region’s first full-time medical-cannabis physicians.

Is this the main Iona Cannabis Clinic?

Yes. The McGregor Boulevard office is the original ICC location, in the Iona area it’s named for, and the flagship of three Southwest Florida offices.

Iona Cannabis Clinic (ICC) — Fort Myers Phone: (239) 689-6819 Address: 15620 McGregor Blvd, Suite 100, Fort Myers, FL 33908 Hours: Mon–Fri 9:00 AM–4:00 PM; Sat–Sun closed Services: Florida medical marijuana certifications, renewals, qualifying-condition evaluations, and state registration guidance Physician: Dr. Gregory R. Sonn (founder & chief medical officer; dually board-certified) Nearby areas served: Fort Myers FL, Cypress Lake FL, Fort Myers Beach FL, Sanibel FL, Lee County FL Last verified: May 2026 Notes: Florida medical marijuana certification clinic (not a dispensary); flagship and original office of Iona Cannabis Clinic (ICC), an independent, physician-led group founded by Dr. Gregory R. Sonn, with additional offices in Port Charlotte and Bonita Springs; weekday hours 9:00 AM–4:00 PM, closed weekends; on historic McGregor Boulevard in the Iona area of south Fort Myers, near the Sanibel causeway. Website: ionacannabisclinic.com