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

Michael J O'Brien, MD

Individual provider Anatomic Pathology Physician · NPI 1700858438

Michael J O'Brien, MD is a Pathology in Boston, Massachusetts. Qualified in 1971, 55 years ago. Practices with South Suburban Gastroenterology PC, a 50-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
55
Licensed in
MA
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

670 Albany St Fl 3 Rm 310
Boston, MA 02118-2646
Phone: (617) 414-5314
Fax: (617) 414-5315
Show map & directions

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

Specialties & licences

Anatomic Pathology Physician (primary) Taxonomy 207ZP0101X · Licence 40684 (MA)

Record details

NPI number1700858438
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 6, 2006
Last updated in NPPESOctober 11, 2019
Mailing address1085 Main St, South Weymouth, MA 02190-1547

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolOTHER
Graduated 1971 (55 years in practice)
Group practice South Suburban Gastroenterology Pc — 50 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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