Dr. Brian J. Brune

Dr. Alexander is a diagnostic radiologist at Johns Hopkins All Children’s. She sees patients on the hospital’s St. Petersburg, Florida, campus. She joined the medical staff in 2025. She was previously a radiologist at Boston Children’s Hospital. Dr. Alexander earned her medical degree from the University of Kansas School of Medicine in Wichita. She completed a diagnostic radiology residency at the University of Missouri in Kansas City. She then completed a diagnostic pediatric radiology fellowship followed by a pediatric musculoskeletal radiology fellowship at Boston Children’s Hospital. Dr. Alexander is rated as an Advanced provider by MediFind in the treatment of Dextrocardia. Her top areas of expertise are Scoliosis, Osteochondritis Dissecans, Knock Knees, and Caffey Disease.

Craig Johnson is a Pediatric Radiologist and an Interventional Radiologist in Orlando, Florida. Dr. Johnson is rated as an Advanced provider by MediFind in the treatment of Dextrocardia. His top areas of expertise are Parkes Weber Syndrome, Congenital Athymia, Chondrodystrophy, and Acropectoral Syndrome.

Diana Marin is a Radiologist in Saint Petersburg, Florida. Dr. Marin is rated as an Experienced provider by MediFind in the treatment of Dextrocardia. Her top areas of expertise are Familial Short Stature (FSS), Idiopathic Short Stature (ISS), Short Stature (Growth Disorders), and Scoliosis.