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

Robert O'Brien MD & Assoc

Organization Specialist · NPI 1598041410

Robert O'Brien MD & Assoc is a Specialist in Winchester, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2011.

Licensed in
MA
In the registry since
2011

Practice location Address checks out

955 Main St G6
Winchester, MA 01890-1961
Phone: (781) 729-4878
Fax: (781) 729-5989
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence 209962 (MA)

Record details

NPI number1598041410
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Robert O'Brien — President · (781) 729-4878
NPI enumeratedOctober 24, 2011
Last updated in NPPESOctober 24, 2011
Mailing address955 Main St, Suite G6, Winchester, MA 01890-1961

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