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

Robert J Obrien Jr, MD and Associates PC

Organization Specialist · NPI 1033563960

Robert J Obrien Jr, MD and Associates PC is a Specialist in Winchester, Massachusetts. Registered with an NPI since 2016.

In the registry since
2016
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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Practice location Address checks out

955 Main St Ste G6
Winchester, MA 01890-1961
Phone: (781) 729-4878
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X

Record details

NPI number1033563960
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Donna O'Brien — Office Manager · (781) 729-4878
NPI enumeratedApril 18, 2016
Last updated in NPPESApril 18, 2016
Mailing address955 Main St, Suite G6, Winchester, MA 01890-1961

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