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Childrens Orthopaedic and Scoliosis Surgery Associates LLP

625 6th Avenue South
Suite 450
St Petersburg, FL 33701 map
Phone: 727-898-2663 | Fax: 727-568-6836


Gregory V. Hahn, M.D. is the chair of the division of orthopaedic surgery at Johns Hopkins All Children's Hospital. He is an affiliate assistant professor at the University of South Florida College of Medicine, Department of Orthopaedics and Sports Medicine. He is the former Chief of Staff at Johns Hopkins All Children's Hospital. Dr. Hahn is board certified and has been recertified by the American Board of Orthopaedic Surgery.

Dr. Hahn sees patients in the St. Petersburg and Tampa locations of Children's Orthopaedic and Scoliosis Surgery Associates, (COSSA) L.L.P. COSSA is the exclusive provider of pediatric orthopaedic services at Johns Hopkins All Children's Hospital.

He received a B.A. from the University of Virginia and his medical degree from the University of Pennsylvania. He stayed at the University of Pennsylvania for his orthopaedic residency training and completed his pediatric orthopaedic fellowship at San Diego Children's Hospital. He is an active member of the American Academy of Orthopaedic Surgeons, the Florida Orthopaedic Society, and the Pediatric Orthopaedic Society of North America. He is a Fellow of the Scoliosis Research Society.

Dr. Hahn enjoys all aspects of pediatric orthopedics and has a special interest in scoliosis. more



  • MD; University of Pennsylvania School of Medicine (1993)


  • Orthopaedic Surgery; University of Pennsylvania School of Medicine (1998)


  • Pediatric Orthopaedic Surgery; Children's Hospital and Health Center (1999)

Board Certifications

  • American Board of Orthopaedic Surgery (Orthopaedic Surgery) (2001)

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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