Meet the Team

Steven M. Zimmet, MD, FACP, FCCP

Internal Medicine, Pulmonary Disease

Dr. Steven Zimmet joined Pulmonary and Medical Associates of Northern Virginia in 1974, after serving in the US Navy. He has particular clinical interests in preventive medicine and the treatment of asthma and COPD.

Anthony Casolaro, MD, FACP

Internal Medicine, Pulmonary Disease

Dr. Anthony Casolaro was born and raised in Northern Virginia. He graduated from Gonzaga college high school and subsequently from University of Virginia. He then entered Georgetown University medical school, where he completed his medical education and graduated as a member of Alpha Omega Alpha honors medical Society. His internship and residency were at Emory University in Atlanta Georgia. Following a residency in internal medicine he received a national research service award at the National Institutes of Health in Bethesda Maryland. There, he was a fellow in the pulmonary branch for two years.

Timothy D. Muir, MD

Internal Medicine

Dr. Timothy Muir joined Pulmonary and Medical Associates of Northern Virginia in 2012 and has been in practice since 2000.

After graduating from the University of Michigan with a Bachelor of Science in Cellular and Molecular Biology, Dr. Muir pursued his medical education at Georgetown University, where he graduated cum laude in 1997. He then completed an internship and residency in internal medicine at the University of North Carolina.

Suzanne H. Wittig, MD

Internal Medicine

Dr. Suzanne Wittig joined Pulmonary and Medical Associates of Northern Virginia in 2012 after practicing in Arlington, VA since 2002.

Dr. Wittig graduated magna cum laude from Georgetown University in 1994, with a Bachelor of Science in Biology. She completed medical school and an Internal Medicine Residency and Chief Residency at Georgetown University in 2002.

David R. Duhamel, MD, FCCP

Interventional Pulmonology, Pulmonary Disease, Critical Care, Internal Medicine

A native of Massachusetts, Dr. David Duhamel joined Pulmonary and Medical Associates of Northern Virginia in 1991. His clinical expertise includes Interventional Pulmonology, Pleural Diseases, and Lung Cancer.

Mary-Margaret Lewis, MD, FCCP

Pulmonary Disease, Sleep Medicine, Critical Care Medicine, Internal Medicine

“I try to help people to live to their full potential, so that they are able to enjoy the best quality of life possible, whether this is related to optimizing quality of sleep or treating lung disease. In the critically ill, the goal is to improve the medical problems to focus on quality of life also.”

Jeff B. Hales, MD, FCCP

Pulmonary Disease, Critical Care Medicine, Internal Medicine

“Keeping you breathing well and living a full and enjoyable life is our mission at Pulmonary and Medical Associates.  Joining Privia Medical Group allows us more tools to effectively achieve that mission.”

Christopher C. Wyckoff, MD

Pulmonary Disease, Critical Care Medicine, Internal Medicine

“Good medical care comes from a team approach that is patient centered. The patient plays a very important role in their health and it is important that they have a say in the decisions that are being made. My patients are not just my patients, but part of my medical family.”

Amit V. Patel, MD, FCCP

Sleep Medicine, Pulmonary Disease, Critical Care Medicine, Internal Medicine

“To me, the practice of medicine means a dynamic relationship with my patients where open and honest conversation ensures that we are focused on the patient as a whole and not simply the medical problem. Education, keeping up to date on the latest research, and experience are just as important to me as listening and learning from the patient in creating our care plans and treatment regimens.”

Lawrence M. Stein, MD, FACP, FCCP

Sleep Medicine, Pulmonary Disease, Critical Care Medicine, Internal Medicine

A native New Yorker, Dr. Lawrence Stein joined Pulmonary and Medical Associates of Northern Virginia in 1991.

John P. Tabacco, MD, MPH, RMSK

Sports Medicine, Internal Medicine

“Most individuals who suffer from joint and muscle pain don’t realize that a variety of non operative treatments are available to them. We strive to get provide patients with comprehensive care so they can get back to life be it as quickly and safely as possible.

Daniel Casey, MD

Critical Care Medicine

A native of Washington, D.C., Dr. Daniel Casey joined Pulmonary and Medical Associates of Northern Virginia in 2013.

Dr. Casey completed his medical education at the Georgetown University School of Medicine in 2006. He then pursued an internship and residency program in internal medicine and pediatrics at Georgetown University Hospital. Finally, he completed a critical care and pulmonary disease fellowship at Medstar Georgetown University Hospital in 2013.

Sam S. Parsia, MD, MPH

Pulmonary Disease, Critical Care Medicine, Internal Medicine

Dr. Sam Parsia received his undergraduate degree from Sarah Lawrence College, and his medical degree from Albert Einstein College of Medicine. he completed his internal medicine internship and residency at Beth Israel Medical Center in New York, and subsequently worked on the Navajo Indian Reservation in Arizona.

Carren Yu Chi Wang, MD

Critical Care Medicine

Originally from South Africa, Dr. Carren Yu Chi Wang joined Pulmonary and Medical Associates of Northern Virginia in 2013.

Dr. Wang completed her undergraduate degree at Cornell University, where she graduated with a Bachelor of Arts in Biology in 2003. After she pursued her medical education at Ohio State University College of Medicine, she completed her internal medicine internship and residency at the Washington Hospital Center. Finally, Dr. Wang finished a fellowship in Pulmonary and Critical Care Medicine in 2013.

Lisa Moak Hall, MPAS, PA-C

Physician Assistant

“I enjoy getting to meet many different people and develop relationships with them while helping to develop individualized plans to maximize their wellness.”

Michael D. Jacobson, MSHS, PA-C

Physician Assistant

Michael D. Jacobson, MSHS, PA-C joined Pulmonary and Medical Associates of Northern Virginia (PMA) in 2005, and is currently the senior physician assistant. He practices both pulmonary and internal medicine/primary care, and works closely with all the physicians at PMA, assisting with their patients as well as managing his own panel. His clinical interests and expertise include asthma / COPD, venous thromboembolic disease (blood clots), and anticoagulation.

Erin M. Svrcek, PA-C

Physician Assistant

Erin Svrcek joined Pulmonary and Medical Associates in 2010.

Erin completed her undergraduate degree at the University of Massachusetts, where she graduated cum laude with a Bachelor of Science in Biology. She then pursued a Master of Science in Health Science and Physician Assistant Studies at the George Washington University in 2009.