Healthcare of Greater Washington

Healthcare of Greater Washington is an urgent care and primary care clinic in Oxon Hill, Maryland, serving patients 12 years and older. The clinic provides family and internal medicine services, accepting walk-ins for urgent illnesses and minor injuries when space is available. It offers a range of care including acute treatment, chronic disease management, physical exams, and prescription refills, with a focus on building long-term patient relationships. The clinic is located at 6357 Oxon Hill Road, conveniently near the Capital Beltway and major highways, and serves residents across Maryland, Virginia, and Washington, D.C. Though rated 3.30 with a moderate number of reviews, the clinic emphasizes accessibility, accepting most private health insurance plans while not serving Medicaid or Medicare.

Founded in 1979 by Dr. Stephen Ong, the clinic began as Ong Medical Center and has since grown into a primary care hub for over 20,000 patients. Dr. Ong, a family physician and medical director, also leads MD Medical Research, a clinical research site on the second floor of the building that has conducted over 150 trials in areas such as diabetes, hypertension, and cardiovascular disease since 1995. The clinic maintains a network of local specialists who visit the office, including gastroenterologists, oncologists, nephrologists, and ophthalmology retinal specialists. Returning patients can use a secure online portal to schedule appointments, request prescription refills, and access lab results, though prescriptions require a doctor visit every four months.

The clinic is situated on Oxon Hill Road, just a short distance from the Oxon Hill Post Office and John Hanson Montessori Elementary School, and within a half-mile of the Capital Beltway and John Hanson Bus Lot. Its location on a main road provides easy access for patients traveling from surrounding neighborhoods and major transit corridors.

Healthcare of Greater Washington is known for its long-standing presence in the community and its integration of clinical care with research opportunities. The clinic’s ability to offer both routine medical services and participation in clinical trials provides unique value to patients seeking accessible care and alternative treatment options. It remains a trusted medical resource in Oxon Hill, serving families and individuals across the region with consistent, patient-centered care.