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Geisinger Health System (GHS) officially welcomed its new class of 51 advanced residents and fellows – including 34 who are new to the Geisinger system – during an orientation program July 1-6.

All of the new advanced residents and fellows have completed four years of medical school and between one and seven years in previous residency or fellowship programs.

The advanced residents have entered specialty programs in anesthesiology, dermatology, diagnostic radiology, general surgery, neurological surgery or ophthalmology.

New fellows have sought to specialize in cardiovascular medicine, clinical informatics, critical care medicine, cytopathology, dermatopathology, gastroenterology, hospice and palliative medicine, interventional cardiology, maternal fetal medicine, medical physics, micrographic surgery and dermatological oncology, nephrology, pulmonary/critical care medicine, rheumatology, sports medicine (emergency medicine) NE, vascular surgery, and vascular & interventional radiology.

Geisinger now educates more than 440 residents and fellows in its education program, which puts the emphasis squarely on the quality of patient care.

“This time in American medicine has us focusing on the quality of the care that we’re delivering. And we’re taking that to education and focusing not only on the quality of the education, but on educating about quality,” said Linda M Famiglio, M.D., FAAP, chief academic officer, GHS. “Over the next couple of years, we expect every Geisinger residency and fellowship program to teach its residents, and its teachers, about how to assess quality – in patient care and the quality of education itself.”

The incoming advanced residents and fellows include the following:

Anesthesiology Residency Program
Trey Creech, M.D.

Dermatology Residency Program

Cassondra Andreychik, M.D.
Robert Bednarek, M.D.
Mary Brady, M.D.
Jennifer Brooks, M.D.

Diagnostic Radiology Residency Program
Rafay Ahmed, M.D.
Saif Ahmed, M.D.
Michael Aidi, M.D.
Sean Hostmeyer, M.D.
Rabia Khan, M.D.

General Surgery Residency Program-Preliminary PGY 2
Michael Eerhart, M.D.
Amanda Munoz, M.D.

Ophthalmology Residency Program
Gordon Crabtree, M.D.
Spencer Onishi, D.O.

Cardiovascular Medicine Fellowship
Claudine Dumandan, M.D.
Nathaniel Eldredge, M.D.
Yasser Khalil, M.D.
James Kilcoyne, D.O.
Mark Schneider, D.O.

Clinical Informatics Fellowship
Chancey Christenson, M.D.
Kyle Marshall, M.D.

Critical Care Medicine Fellowship
Aftab Ahmed, M.D.
Shaeesta Khan, M.D.
Ammar Sharif, M.D.

Gastroenterology Fellowship
Nasir Akhtar, D.O.
Sara West, D.O.

Hospice and Palliative Medicine Fellowship
Shagufta Firdous, M.D.
Waqas Jehangir, M.D.

Nephrology Fellowship Program
Jason George, D.O.
Julia Leddy, D.O.
Gerald Shovlin, D.O.

Neurological Surgery Residency Program
Ashish Patel, M.D.

Pulmonary/Critical Care Medicine Fellowship
Himaja Koneru, M.D.
Benjamin Silverman, M.D.

Rheumatology Fellowship Program
Philip Dunn, D.O.
Abraham Tacang, M.D.

Sports Medicine (Emergency Medicine) NE Fellowship

Ryan Channick, M.D.
Tiffany Tsay, M.D.

Cytopathology Fellowship
Yelena Piazza, M.D.
Rachel Swarrow, D.O.

Dermatopathology Fellowship Program
Ryan Berry, M.D.
Jose Ollague, M.D.

Maternal Fetal Medicine Fellowship Program

Kajal Angras, D.O.

Micrographic Surgery and Dermatological Oncology Fellowship
Elizabeth Chase, M.D.
Nicole Warner, M.D.

Medical Physics Fellowship
Jillian Hauck, M.S.

Pulmonary/Critical Care Medicine Fellowship
Cynthia Tsai, D.O.

Vascular Surgery Fellowship Program
Jeremy Irvan, M.D.
Yi (Joey) Zhou, M.D.

Vascular & Interventional Radiology Fellowship
Steven Bonebreak, D.O.
Vinod Maller, M.D.

Interventional Cardiology Fellowship
John Pfeifer, M.D.

For more information on Geisinger’s graduate medical education program, please visit

About Geisinger
Geisinger is among the nation’s leading providers of value-based care, serving 1.2 million people in urban and rural communities across Pennsylvania. Founded in 1915 by philanthropist Abigail Geisinger, the non-profit system generates $10 billion in annual revenues across 134 care sites - including 10 hospital campuses, and Geisinger Health Plan, with 600,000 members in commercial and government plans. The Geisinger College of Health Sciences educates more than 5,000 medical professionals annually and conducts more than 1,400 clinical research studies. With 26,000 employees, including 1,600 employed physicians, Geisinger is among Pennsylvania’s largest employers with an estimated economic impact of $14 billion to the state’s economy. On March 31, 2024, Geisinger became the first member of Risant Health, a new nonprofit charitable organization created to expand and accelerate value-based care across the country.  Learn more at or connect with us on Facebook, Instagram, LinkedIn and X.

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