William Brien, M.D.
NPI 1447294632 · Specialist · Los Angeles, CA
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Brien, M.D. is a Specialist provider in Los Angeles, CA (NPI 1447294632).
Provider details
- NPI number
- 1447294632
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G53111 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$35 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-16
- Last updated
- 2013-09-04
Frequently asked questions
- What is William Brien's NPI number?
- William Brien's National Provider Identifier (NPI) is 1447294632, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Brien's specialty?
- William Brien is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is William Brien located?
- William Brien's practice location on file with NPPES is 8700 Beverly Blvd, Los Angeles, CA 90048-1865.
- What is William Brien's phone number?
- The practice phone number listed in the NPPES registry for William Brien is (310) 967-1884.
- Does William Brien accept Medicare?
- William Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Brien's NPI active?
- Yes — William Brien's NPI (1447294632) is active in the NPPES registry as of the last update on 2013-09-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.