Doctor Maria A. Bogaert
Maria A. Bogaert, MD

Dr. Maria Bogaert is a board-certified dermatologist, dermatological surgeon, and a fellow of the American Academy of Dermatology. Born and raised in the Dominican Republic, Dr. Bogaert graduated summa cum laude from Universidad Nacional Pedro H. Urena. She completed dual residencies in Internal Medicine and Dermatology at the University of Miami School of Medicine, where she also served as chief resident. Dr. Bogaert has been in practice in Winchester, Virginia for over 20 years. She enjoys caring for both adults and children with disorders of the skin, and is interested in general and surgical dermatology.

Doctor Frederick G. Wenzel
Frederick G. Wenzel, MD

Dr. Wenzel graduated summa cum laude from Davidson College and completed his medical degree at Duke University with honors. In addition, he was a basic science research fellow at Harvard University as the recipient of the prestigious Sarnoff Fellowship Program, and was awarded a student research award from the National Institutes of Health. He completed an internship in Internal Medicine and a residency in Dermatology at Johns Hopkins Hospital, and was selected as chief resident in Dermatology during his final year. He has been practicing general and surgical dermatology in Winchester since 1997. His interests include medical dermatology, autoimmune dermatologic disorders, and skin cancer surgery.

Doctor Michael E. Mathieu
Michael E. Mathieu, MD

Dr. Michael E. Mathieu is board-certified both by the American Board of Dermatology and by the American Board of Internal Medicine. He attended Medical School at Howard University in Washington D.C., and afterward completed dual residencies in Internal Medicine and Dermatology at the University of Virginia in Charlottesville. He also earned a fellowship in infectious disease from Harvard Medical School. Dr. Mathieu has practiced dermatology in Winchester, Virginia since 2001. His special interests include skin cancer, pediatric dermatology, and dermatologic manifestations of systemic disease.

Humza Ilyas, MD

After graduating cum laude from Penn State University, Dr. Ilyas earned his medical degree from Jefferson Medical College in Philadelphia. He then completed his internship in internal medicine at the Western Pennsylvania Hospital in Pittsburgh and his dermatology residency at Albert Einstein College of Medicine in New York City. During his final year of residency, Dr. Ilyas was awarded the honor of chief resident in dermatology.  Dr. Ilyas then completed a fellowship in Mohs Surgery & Procedural Dermatology at the University of Wisconsin.


Dr. Ilyas specializes in Mohs surgery and advanced reconstructive techniques.  Dr. Ilyas is a diplomate of the American Board of Dermatology, a fellow of the American Academy of Dermatology, and a member of the American College of Mohs Surgery.  He has published widely and presented his findings at numerous medical conferences. In addition, he has written textbook chapters on nonmelanoma skin cancer for primary care physicians.