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Overview and Leadership

The Mary Washington Healthcare Internal Medicine Residency Program is built around a 4+2+2 schedule. Residents will have four weeks of primary rotations consisting of the ICU, inpatient wards, night float, or required subspecialties rotations. The following two weeks, residents will rotate on electives, followed by two weeks of rotating within the ambulatory continuity clinic. We believe this model perfectly balances clinical care, educational opportunities, and personal well-being. The program has developed tracks for residents who are interested in hospital-based medicine or primary care.

Stafford Hospital

Program Leadership

  • Andrew Mangano, DO

    Andrew Mangano, DO, MBA, FHM, FACP
    Program Director

    Medical School: Philadelphia College of Osteopathic Medicine. Philadelphia, PA
    Residency: Lehigh Valley Health Network. Allentown, PA
    Career Interest: Quality Improvement, Resident and Faculty Well-being, Patient Safety

I grew up in the suburbs of Philadelphia and attended The Pennsylvania State University as an undergraduate where I met my wife, Sarah. After college, I attended PCOM and then completed Internal Medicine residency at Lehigh Valley Health Network. I was very fortunate to have excellent teaching faculty who first sparked my interest in medical education. I worked as a private hospitalist for four years before moving into academics. I always knew I would find my way into teaching, and I was approached for a core faculty position while working at Grand Strand Medical Center in Myrtle Beach, South Carolina. I’ve been involved with medical education since 2014 and have won multiple “teacher of the year” awards. I’ve spent the last eight years helping build new residency programs at Grand Strand as core faculty, the Internal Medicine Associate Program Director, and Transitional Year program Director. I held many leadership positions including Chairman of Professional Peer Review, Chairman of Medicine, and Chief of Staff while in South Carolina. I currently sit on the Transitional Year Review Committed for the ACGME. During the pandemic, I obtained my MBA at Coastal Carolina University with a concentration in healthcare administration.

I was drawn to Mary Washington Healthcare for the opportunity to build my own program from the ground up and help shape the future of medicine within the healthcare system. After meeting with hospital leadership, I was impressed with the five-year vision of the hospital and their sincere commitment to develop a world class program. Throughout my career, I’ve valued the personal connections I have made with residents and faculty. When not at work, I enjoy spending time with my wife and daughter, traveling, exploring new restaurants, and playing golf.

Associate Program Directors

Sagah Ahmed, MD
Director of Academic Curriculum and Development

Medical School: George Washington University School of Medicine, Washington, DC

Residency: Medstar Georgetown University Hospital, Washington, DC

Career Interest: Medical education, global health, underserved medicine

I was born in Berlin, Germany, and then moved to the US when I was a wee child. I grew up in Northern VA right outside of DC, and attended the University of Maryland, where I majored in Arabic. Subsequently, I spent eight years in Washington, DC; first, I attended George Washington University for medical school, where I completed the Medical Humanities Track. During medical school, I became interested in refugee and underserved healthcare, and was able to work at Bread for the City, a FQHC in northeast DC, in addition to participating in global health efforts in refugee camps in Lesvos, Greece. I then made the bold move down the street to complete my residency and chief year at Georgetown University Hospital in Washington, DC. As a resident and chief resident, I became PHR-trained to conduct refugee asylum evaluations (and yes, we did them over Zoom during the pandemic!)

I fell in love with medical education over the course of my training, and was drawn to Mary Washington Healthcare by the passion of the program and its leadership for resident education and development. My other academic interests include women in medicine, quality improvement, infection control and prevention. In my free time I like to run, go to comedy shows, and read as many fiction books as I can.

  • Nilsa Jimenez, MD

    Nilsa Jimenez, MD
    Director of Inpatient Medicine Services

    Medical School: University of Central Caribbean, Bayamón, PR
    Residency: University of Connecticut, Farmington, CT
    Career Interest: Clinical Research, Compliance, and Quality Improvement

I was born and raised in Bayamón, Puerto Rico, and attended the University of Puerto Rico for my undergraduate education. I graduated Magna Cum Laude with a B. S. in Human Biology. I obtained my M.D. in June 2008 from the University of Central Caribbean in Bayamón, PR. While in medical school I was commissioned as a Naval Officer and after I graduated, I attended an internship year at the Naval Medical Center in Bethesda, Maryland.

After completion of my internship, I was assigned to CLB-3 on Marine Corps Base Hawaii in Kane’ohe Bay serving as the Department Head of the Battalion’s Aid Station overseeing the medical care and treatment of all personnel. I deployed to Helmand Province, Afghanistan and treated combat related injuries, went on humanitarian missions providing medical care to villages, and had the opportunity to collaborate with the Afghanistan National Army conducting advance combat medicine to their service members. Once I returned from deployment I transferred to Naval Health Clinic Hawaii in Pearl Harbor, HI where I served as a primary care physician for Navy and Coast Guard personnel.

I then completed my Internal Medicine Residency at the University of Connecticut. Since completing residency I have worked primarily as a Hospitalist/Nocturnist in Fredericksburg and Richmond areas. During this time, I served as the Interim Director of Hospital Medicine while filling my role as Hospitalist, as a member of the Quality Improvement Committee, and I am a current member of Mary Washington Healthcare’s Providers Advisory Council.

I have been with Mary Washington Healthcare since January 2020. In my spare time I enjoy spending time with my husband and two kids while enjoying the local attractions including our national monuments and museums, traveling, and exploring new places, and partaking in culinary exploration.

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