The 10 largest medical groups in Maryland by physicians
Johns Hopkins University is the largest medical group in Maryland, with 3,494 physicians, followed by Mid-Atlantic Permanente Medical Group in Largo (2,304) and Johns Hopkins Department of Orthopaedic Surgery in Middle River (1,136).
- Johns Hopkins University3,494physicians5,010HCPs
- Mid-Atlantic Permanente Medical Group2,304physicians2,958HCPs
- Johns Hopkins Department of Orthopaedic Surgery1,136physicians1,477HCPs
- Johns Hopkins Community Physicians842physicians1,273HCPs
- Johns Hopkins Medicine662physicians959HCPs
- UM Community Medical Group589physicians996HCPs
- Sinai Rehab Pain Medicine Associates579physicians908HCPs
- Luminis Health Maternal and Fetal Medicine Annapolis551physicians987HCPs
- Meritus Radiology545physicians860HCPs
- University of Maryland Medical Center Gastroenterology and Hepatology460physicians656HCPs
The 10 largest of 1,485 Maryland medical groups that report physicians. Ranks compare size, not quality of care.
Every medical group in MarylandThe median Maryland medical group has 3 physicians
1,485 Maryland medical groups report physicians. The median medical group has 3 physicians, so Johns Hopkins University is about 1,165 times that size.
- the size of the median Maryland medical group, which has 3 physicians
- 1,165×
- of the 1,485 Maryland medical groups that report physicians
- 0.7%
How we ranked the largest Maryland medical groups
- Measure
- Physicians linked to each group in CMS enrollment and the Dmand AI database.
- What counts as a group
- One Medicare PAC ID. A group that bills under several names counts once.
- Field
- 1,485 Maryland medical groups in the Dmand AI database report physicians.
- Ties
- Medical groups with the same number share a rank.
- HCPs
- Healthcare professionals with a current link to the group in the Dmand AI database.
- What a rank means
- Size only. A rank compares physicians; it says nothing about quality of care.
- Refresh
- Monthly. Updated Oct 28, 2026.
FAQ
Questions about the largest Maryland medical groups
Answers from the same data, updated monthly.
What is the largest medical group in Maryland?
Johns Hopkins University in Baltimore, with 3,494 physicians. Mid-Atlantic Permanente Medical Group is second with 2,304.
What are the 10 largest medical groups in Maryland?
By physicians: Johns Hopkins University (3,494), Mid-Atlantic Permanente Medical Group (2,304), Johns Hopkins Department of Orthopaedic Surgery (1,136), Johns Hopkins Community Physicians (842), Johns Hopkins Medicine (662), UM Community Medical Group (589), Sinai Rehab Pain Medicine Associates (579), Luminis Health Maternal and Fetal Medicine Annapolis (551), Meritus Radiology (545), University of Maryland Medical Center Gastroenterology and Hepatology (460).
How many physicians does a typical Maryland medical group have?
The median Maryland medical group that reports physicians has 3 physicians, out of 1,485 that report them.
How often is this list updated?
Every month, when the Dmand AI database refreshes. This version is from Oct 28, 2026.
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