Walter R Obrien MD Inc a Medical Corporation
NPI 1851623029 · Sports Medicine (Family Medicine) Physician · Los Angeles, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter R Obrien MD Inc a Medical Corporation is a Sports Medicine (Family Medicine) Physician organization in Los Angeles, CA (NPI 1851623029).
Provider details
- NPI number
- 1851623029
- Entity type
- Organization
- Primary specialty
- Sports Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Walter O'Brien, Owner(310) 477-7276
- License
- G63193 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
Mailing address
Other names (DBA / former)
- Doing business as
- Walter Obrien MD Inc a Medical Corporation
Registry dates
- Enumerated
- 2010-02-12
- Last updated
- 2023-03-07
Frequently asked questions
- What is Walter R Obrien MD Inc a Medical Corporation's NPI number?
- Walter R Obrien MD Inc a Medical Corporation's National Provider Identifier (NPI) is 1851623029, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Walter R Obrien MD Inc a Medical Corporation?
- Walter R Obrien MD Inc a Medical Corporation is classified in the NPPES registry as Sports Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Walter R Obrien MD Inc a Medical Corporation located?
- Walter R Obrien MD Inc a Medical Corporation's practice location on file with NPPES is 11710 Wilshire Blvd, Los Angeles, CA 90025-1503.
- What is Walter R Obrien MD Inc a Medical Corporation's phone number?
- The practice phone number listed in the NPPES registry for Walter R Obrien MD Inc a Medical Corporation is (310) 477-7276.
- Does Walter R Obrien MD Inc a Medical Corporation accept Medicare?
- Walter R Obrien MD Inc a Medical Corporation is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Walter R Obrien MD Inc a Medical Corporation?
- The authorized official listed on Walter R Obrien MD Inc a Medical Corporation's NPPES record is Walter O'Brien, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Walter R Obrien MD Inc a Medical Corporation's NPI active?
- Yes — Walter R Obrien MD Inc a Medical Corporation's NPI (1851623029) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.