Capitol Heights, MD

ZIP code 20799 is located in Washington, D.C., specifically on the grounds of the National Institutes of Health (NIH). This area is home to several important landmarks, including the Clinical Center, the largest hospital on the NIH campus, and the National Library of Medicine, the world's largest biomedical library. Visitors can also find the National Institute of Allergy and Infectious Diseases and other critical research facilities within this zip code.