Dr. Charles M. Callahan is an infectious disease specialist in Fort Myers, Florida and is affiliated with multiple hospitals in the area, including Lee Memorial Hospital and Cleveland Clinic Indian River Hospital. He received his medical degree from University of South Florida Morsani College of Medicine and has been in practice for more than 20 years. Dr. Charles M. Callahan has expertise in treating pneumonia, among other conditions - see all areas of expertise. Dr. Charles M. Callahan accepts Medicare, Aetna, Humana, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted.