Kopa Medical Advisory Board

Dr. John O’Hanlon, is an ABPM (American Board of Podiatric Medicine) board-certified podiatrist and foot surgeon.Since 1991, Dr. O’Hanlon has been a staff surgeon at Northern Westchester Hospital. He served as the Chief Division of Podiatric Medicine and Surgery at Northern Westchester Hospital Center from 1997-2008.

Specializing in a variety of foot, ankle, and leg conditions, Dr. O’Hanlon is the trusted podiatrist consult for the New York Yankees.

Dr. O’Hanlon graduated from the State University of New York at Albany, and Temple University of Podiatric Medicine.

Dr. Josephine Kleyner, is a board-certified podiatrist and foot surgeon specializing in reconstructive foot surgery, sports injuries, limb salvage, and diabetic wound care. Dr. Kleyner completed her surgery residency program at the NewYork-Presbyterian Brooklyn Methodist Hospital and Presbyterian Downtown Hospital, ultimately serving as chief resident. Dr. Kleyner is professionally affiliated with Northwell Health Lenox Hill and New York-Presbyterian Brooklyn Medical Hospitals, and maintains memberships with the American College of Foot and Ankle Surgeons, and the American Podiatric Medical Association. An avid runner and athlete, In 2025 Dr. Kleyner served as the on-site podiatrist for the New York City Marathon.

Dr. Kleyner graduated from the State University of New York at Stony Brook, and New York College of Podiatric Medicine.