OrganizationActive
Robert O'Brien MD & Assoc.
NPI 1598041410 · Specialist · Winchester, MA
Robert O'Brien MD & Assoc. is a Specialist organization in Winchester, MA (NPI 1598041410).
Provider details
- NPI number
- 1598041410
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- Robert O'Brien, President(781) 729-4878
- License
- 209962 (MA)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(80/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
955 Main St
G6
Winchester, MA 01890-1961
Phone: (781) 729-4878
Fax: (781) 729-5989
Street-level locationGet directions
Mailing address
955 Main St
Winchester, MA 01890-1961
Registry dates
- Enumerated
- 2011-10-24
- Last updated
- 2011-10-24
Frequently asked questions
- What is Robert O'Brien MD & Assoc.'s NPI number?
- Robert O'Brien MD & Assoc.'s National Provider Identifier (NPI) is 1598041410, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Robert O'Brien MD & Assoc.?
- Robert O'Brien MD & Assoc. is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is Robert O'Brien MD & Assoc. located?
- Robert O'Brien MD & Assoc.'s practice location on file with NPPES is 955 Main St, Winchester, MA 01890-1961.
- What is Robert O'Brien MD & Assoc.'s phone number?
- The practice phone number listed in the NPPES registry for Robert O'Brien MD & Assoc. is (781) 729-4878.
- Who is the authorized official for Robert O'Brien MD & Assoc.?
- The authorized official listed on Robert O'Brien MD & Assoc.'s NPPES record is Robert O'Brien, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Robert O'Brien MD & Assoc.'s NPI active?
- Yes — Robert O'Brien MD & Assoc.'s NPI (1598041410) is active in the NPPES registry as of the last update on 2011-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.