MCMC Internal Medicine Residency Program

Faculty and Staff

Our program has a faculty of more than 80 full-time, part-time and voluntary physicians who possess outstanding academic qualifications and are dedicated to developing skilled physicians who are well prepared to meet today’s health care challenges. MCMC physician-educators actively participate in all aspects of the program’s curriculum, which has greatly added to residents’ patient interactions.

Eric Green, MD, MSc, FACP

Manzoor A. Rather, MD, MRCP, FACP

  • Manzoor A. Rather, M.D., MRCP, FACP Internal Medicine Residency Associate Director, Mercy Catholic Medical Center
  • Director, Hospitalist Program, Mercy Fitzgerald
  • Specialty: Internal Medicine



Kevin S. Fleming, MD, FHM, FACP

  • Kevin Fleming, MDInternal Medicine Residency Associate Program Director, Mercy Catholic Medical Center
  • Specialty: Internal Medicine

Michael J. Korman, MD, FACP, FCCP

  • Internal Medicine Residency Assistant Director, Mercy Catholic Medical Center
  • Specialties: Internal Medicine and Pulmonary Medicine
  • Recognized as a 2018 Top Doc in Philadelphia magazine.

Dominic J. Valentino, III, DO, FCCP

  • Dr. Dominic ValentinoMedical Director of Critical Care, Mercy Fitzgerald
  • Director of Osteopathic Medical Education, Mercy Catholic Medical CenterProgram Director, Transitional Year Residency and Rotating Internship, Mercy Catholic Medical Center
  • Specialties: Internal Medicine, Pulmonary Medicine, Critical Care and Sleep Medicine


Eugene J. Choi, MD

Dr. Eugene Choi
  • Specialty: Hematology/Oncology

Mervyn D. Danilewitz, MD, FACP, MBA

  • Dr. Mervyn DanilewitzSection Chief, Gastroenterology, Mercy Philadelphia
  • Specialty: Gastroenterology

Ravindra Hallur, MD

  • Director, Hospitalists Program, Mercy Philadelphia
  • Dr. Ravindra HallurSpecialty: Internal Medicine

Jay Hubsher, MD

  • Dr. Jay HubsherSpecialty: Nephrology

Steven Lichtenstein, DO

Steven Lichtenstein, DO
  • Section Chief, Gastroenterology, Mercy Fitzgerald
  • Specialty: Gastroenterology
  • Recognized as a 2018 Top Doc in Philadelphia magazine.

William B. McNamee, Jr., MD

  • William McNameeSection Chief, Infectious Diseases, Mercy Fitzgerald
  • Specialty: Infectious Diseases



Mary Musuku, MD

  • Dr. Mary MusukuSpecialty: Geriatric Medicine

Jayamohan Nair, MD, MRCP, FACP

  • Dr. Jayamohan NairAcademic Hospitalist, Mercy Fitzgerald
  • Student Advisor, Physician Assistant Students
  • Specialty: Internal Medicine

Martin O'Riordan, MD

  • Dr. Martin O'RiordanSection Chief, Cardiology, Mercy Fitzgerald
  • Specialty: Cardiovascular Disease
  • Recognized as a 2018 Top Doc in Philadelphia magazine.

Ajay Pillai, MD

  • Dr. Ajay PillaiMedical Director, Sleep Disorders Centers, Mercy Fitzgerald
  • Specialties: Pulmonary Medicine, Critical Care and Sleep Medicine

Edward Ruby, MD

  • Section Chief, Endocrinology, Mercy Fitzgerald
  • Specialty: Endocrinology

Meet Our Staff

Carina Sundstrom
Administrator, Graduate Medical Education
Margie Carroll
Program Coordinator, TYR & GME
Stefanie Cordoue
Program Coordinator, Internal Medicine
Shayna Caliman
Program Coordinator, Surgery
Meggan Drake
Program Coordinator, Radiology
Janet Thorp
Medical Student Coordinator & Administrative Assistant, GME

More Information

For more information about the Internal Medicine Residency Program at Mercy Catholic Medical Center, please email