Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Robert O'Brian, MD

Individual provider Rheumatology Physician · NPI 1730140724

Dr. Robert O'Brian, MD is a Rheumatology in Eldersburg, Maryland. Graduated from George Washington University School of Medicine in 1998, 28 years ago. Practices with Eldersburg Arthritis LLC, a 4-clinician group and accepts Medicare assignment. Licensed in North Carolina.

Years since qualifying
28
Trained at
George Washington University School of Medicine
Licensed in
NC
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

6190 Georgetown Blvd Ste 110
Eldersburg, MD 21784
Phone: (410) 795-9700
Fax: (410) 795-7500
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence 9901590 (NC)

Record details

NPI number1730140724
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 29, 2006
Last updated in NPPESOctober 6, 2020
Certification dateOctober 6, 2020
Mailing address6190 Georgetown Blvd, Suite 110, Eldersburg, MD 21784

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRHEUMATOLOGY
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1998 (28 years in practice)
Group practice Eldersburg Arthritis Llc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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