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

Mary Ellen O'Brien, MD

Individual provider Internal Medicine Physician · NPI 1144425000

Mary Ellen O'Brien, MD is a Hospitalist in Providence, Rhode Island. Qualified in 2007, 19 years ago. Practices with Coastal Medical Associates, a 446-clinician group and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
19
Licensed in
RI
In the registry since
2007
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

593 Eddy St
Providence, RI 02903-4923
Phone: (401) 444-4083
Fax: (401) 444-3056
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence LP01243 (RI)

Record details

NPI number1144425000
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 19, 2007
Last updated in NPPESJanuary 22, 2010

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Coastal Medical Associates — 446 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Providence