Dr. John Leddy MD Internist

Dr. John Leddy is an internist in Buffalo, New York and is affiliated with multiple hospitals in the area, including Erie County Medical Center and KALEIDA Health. He received his medical degree from SUNY Buffalo School of Medicine and Biomedical Sciences and has been in practice for 29 years. Dr. Leddy accepts several types of health insurance, listed below. He is one of 23 doctors at Erie County Medical Center and one of 3 at KALEIDA Health who specialize in Internal Medicine.

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Office Location

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Specialty & Clinical Interests

Internist: Sports Medicine (Non-Surgical)

Hospital Affiliation

Erie County Medical Center


Millard Fillmore Suburban - Kaleida Health

Education & Medical Training

Beth Israel Deaconess Medical Center
Residency, Internal Medicine, 1985–1988

SUNY Buffalo School of Medicine and Biomedical Sciences
Class of 1985

Certifications & Licensure

American Board of Internal Medicine
Certified in Internal Medicine

American Board of Internal Medicine
Certified in Sports Medicine

NY State Medical License
Active through 2015

Awards, Honors & Recognition

Fellow (FAAAAI), American Academy of Allergy Asthma and Immunology

Publications & Presentations

Diffusion Tensor Imaging Alterations in Patients With Postconcussion Syndrome Undergoing Exercise Treatment: A Pilot Longitudinal Study.
Polak, P.,Leddy, J. J.,Dwyer, M. G.,Willer, B.,Zivadinov, R.

Exercise treatment for postconcussion syndrome: a pilot study of changes in functional magnetic resonance imaging activation, physiology, and symptoms.
Leddy, J. J.,Cox, J. L.,Baker, J. G.,Wack, D. S.,Pendergast, D. R.,Zivadinov, R.,Willer, B.

Evaluation of the Zurich Guidelines and Exercise Testing for Return to Play in Adolescents Following Concussion.
Darling, S. R.,Leddy, J. J.,Baker, J. G.,Williams, A. J.,Surace, A.,Miecznikowski, J. C.,Willer, B.

Insurances Accepted

  • Aetna Choice POS II
  • Aetna HMO
  • BCBS Florida BlueCare HMO
  • CIGNA Open Access
  • First Health PPO
  • Great West PPO
  • MagnaCare PPO
  • Multiplan PHCS PPO
  • United Healthcare - Direct Options PPO
  • BCBS Blue Card PPO
  • BCBS Florida NetworkBlue
  • BCBS Florida Preferred Patient Care PPO
  • Coventry Florida - Employer Group PPO
  • Humana ChoiceCare Network PPO
  • Multiplan PPO
  • United Healthcare - Direct Choice Plus POS

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