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

Dr. Colin H O'Brien, MD

Individual provider Emergency Medicine Physician · NPI 1538142708

Dr. Colin H O'Brien, MD is an Emergency Medicine in Worcester, Massachusetts. Qualified in 1988, 38 years ago. Practices with Foundation Medical Partners Inc, a 311-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
38
Licensed in
MA
In the registry since
2005
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

55 Lake Ave N Dept OF Emergency Medicine
Worcester, MA 01655-0002
Phone: (508) 856-4101
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 153284 (MA)

Record details

NPI number1538142708
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 22, 2005
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Group practice Foundation Medical Partners Inc — 311 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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