This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / MD

ROBERT JOHN O'BRIAN, MD

RHEUMATOLOGY

Medical school: GEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE

Graduated: 1998

NPI: 1730140724

Practice Locations (1)

ELDERSBURG ARTHRITIS LLC

6190 GEORGETOWN BLVD, SUITE 110

ELDERSBURG, MD 217846460

4107959700

Source: CMS National Downloadable File, September 2026.

ROBERT O'BRIAN, MD | HealthCareAtlasUSA