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Faculty & Staff

Home 9 Services 9 Residency Program 9 Internal Medicine 9 Faculty & Staff

Internal Medicine Faculty & Staff

Mathew Mathew, MD

Mathew Mathew, MD

Program Director

Sivakoti N. Gupta, MD

Sivakoti N. Gupta, MD

David Kalos, MD

David Kalos, MD

Associate Program Director

Assad Mohammedzein, MD

Assad Mohammedzein, MD

Internal Medicine

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Core Faculty

Javaria Sarwar, MD

Javaria Sarwar, MD

Board-Certified Internist

Michael Lagnese, DO

Michael Lagnese, DO

Board-Certified in Pulmonary Disease, Critical Care Medicine, and Sleep Medicine

Eric Shakespeare, MD

Eric Shakespeare, MD

Board-Certified in Sleep Medicine, Pulmonary Disease, and Critical Care Medicine

Penn Tong, MD

Penn Tong, MD

Board-Certified Interventional Radiologist

Bereket Tewoldemedhin, MD

Bereket Tewoldemedhin, MD

Infectious Disease Specialist

Mathew Mathew, MD
Program Director

Board-Certified Internist

Dr. Mathew has been an integral part of Roxborough Memorial Hospital since 2018, serving in several pivotal roles, including Program Director, Hospitalist, and Chief Medical Officer. His commitment to improving healthcare delivery and enhancing patient experiences is evident through his tireless efforts and leadership.

Dr. Mathew’s educational credentials are noteworthy; he earned a B.S. in Chemistry and an M.B.B.S. from the University of Kerala in India. He subsequently completed a residency externship at Diagnostic Center Hospital in Houston, Texas, followed by an internship, residency, and chief residency in Internal Medicine at the Presbyterian Medical Center of Philadelphia/University of Pennsylvania Health System. These experiences have sharpened his clinical expertise and leadership skills. His active involvement in various boards and committees has led to his recognition as a Fellow of the American College of Physicians.

David Kalos, MD
Associate Program Director

Board-Certified in Critical Care, Internal Medicine, and Pulmonary Disease

Dr. David Kalos is a Pulmonary Disease Specialist based in Allentown, Pennsylvania. He graduated with honors from Jefferson Medical College of Thomas Jefferson University in 2010. With over 15 years of diverse experience, Dr. Kalos specializes in pulmonary disease and critical care, bringing valuable expertise to the program.