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

Sharon Reilly O'Brien

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1477541647

Sharon Reilly O'Brien is a Critical Care (Intensivists) in Washington, District of Columbia. Graduated from George Washington University School of Medicine in 1991, 35 years ago. Practices with Medstar Medical Group II LLC, a 3,717-clinician group and accepts Medicare assignment. Licensed in District of Columbia.

Years since qualifying
35
Trained at
George Washington University School of Medicine
Licensed in
DC
In the registry since
2005
Specialties on file
2
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Practice location Address checks out

3800 Reservoir Rd NW
Washington, DC 20007-2113
Phone: (202) 444-8830
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 33130 (DC)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 33130 (DC)

Record details

NPI number1477541647
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedOctober 11, 2005
Last updated in NPPESDecember 3, 2007

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesINTERNAL MEDICINE, PULMONARY DISEASE
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1991 (35 years in practice)
Group practice Medstar Medical Group Ii Llc — 3717 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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