Mark J. Jaffe, M.D


Dr. Mark Jaffe Jaffe was raised in Washington, DC, graduating from Woodrow Wilson High School in 1971. He attended the University of Michigan for his undergraduate studies. Majoring in psychology, he also fulfilled his pre-medical requirements and graduated with high distinction in 1975. Jaffe then attended Georgetown University School of Medicine graduating in 1979. He then did his residency training at Jefferson Medical College in Philadelphia, Washington Hospital Center in DC, and Wayne State University in Michigan, where he served as chief resident in dermatology in 1983.

Dr. Jaffe returned to the DC area in 1987, joining a small practice that had been established in 1962. Under Jaffe’s leadership, the practice has grown to its current status as one of the largest and most respected dermatology practices in Maryland. He joined the faculty of Georgetown’s School of Medicine in 1988 and is currently an Assistant Professor, actively involved with medical school admissions. He has authored multiple articles pertaining to dermatology, especially legal concerns in dermatology. Jaffe and his wife Susan (an instructor at The George Washington School of Education) reside in Bethesda and have been married for 41 years. They have three sons – Eric, a journalist with Google, Robert, a psychiatrist with Mt. Sinai Hospital, and Adam, a digital integrator with Turner Broadcasting.

John F. O'Neill, Jr., M.D.


Dr. John F. O'NeillDr. O’Neill received his undergraduate degree from the College of William and Mary and his medical degree from Georgetown University School of Medicine. After serving in the US Navy as a medical officer, he completed his dermatology training at Bethesda Naval Hospital. He joined Dr. Jaffe in private practice in 1992 and has been active in the local medical community since then. Dr. O’Neill is a member of the Montgomery County Medical Society and is on staff at Suburban Hospital. He was the past chairman of dermatology at Suburban Hospital. He is also the past president of the Georgetown Clinical Society and Osler Medical Society.

Ann M. Lindgren, M.D.


Dr. Ann M. LindgrenDr. Lindgren received both her undergraduate and medical degrees from Harvard University. She subsequently completed her dermatology training at Harvard University under the tutelage of Dr. Thomas Fitzpatrick and Dr. Sam Moschella, two of the foremost dermatology professors in the country. Dr. Lindgren joined Drs. Jaffe and O’Neill in 1997 and has been active in the local medical community since then. She is also a member of the Society for Pediatric Dermatology as well as the Women’s Dermatologic Society.