Dr. Robert D. Sullivan

Hassan Zammam, MD, is certified in internal medicine by the American Board of Internal Medicine. He practices at Blair Medical Associates, Station Medical Center and is affiliated with UPMC Altoona. He completed a fellowship at Allegheny University Hospitals, residency at Bon Secours Hospital, residency at Damascus University, and his medical degree at Damascus University Medical College. Dr. Zammam is rated as an Advanced provider by MediFind in the treatment of Obesity in Children. His top areas of expertise are Melorheostosis with Osteopoikilosis, Melorheostosis, Osteopenia, Colonoscopy, and Gastrostomy.

Richard Johnson is a primary care provider, practicing in Internal Medicine in Clearfield, Pennsylvania. Dr. Johnson is rated as an Advanced provider by MediFind in the treatment of Obesity in Children. His top areas of expertise are Osteoporosis, Postmenopausal Osteoporosis, Maturity Onset Diabetes of the Young, and Osteoarthritis.

Stephen Kruk is a primary care provider, practicing in Internal Medicine in Du Bois, Pennsylvania. Dr. Kruk is rated as a Distinguished provider by MediFind in the treatment of Obesity in Children. His top areas of expertise are Anemia, Pharyngomaxillary Space Abscess, Sinusitis, and Grass Allergy.