WALTER OBRIEN MD INC A MEDICAL CORPORATION
NPI 1851623029
Family Medicine - Sports Medicine in Los Angeles, CA
About Walter Obrien Md Inc A Medical Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WALTER OBRIEN MD INC A MEDICAL CORPORATION (NPI 1851623029) is a healthcare organization registered as a sports medicine in Los Angeles, California and active in the NPI registry since February 2010. The organization lists Walter Ray O'brien, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Walter Obrien Md Inc A Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Walter Obrien MD Inc A Medical Corporation, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (2)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Walter R Obrien MD Inc A Medical Corporation's NPI number?
The NPI number for Walter R Obrien MD Inc A Medical Corporation is 1851623029. It was assigned to this organization in the NPPES registry on February 12, 2010. The provider is doing business as Walter Obrien MD Inc A Medical Corporation.
Where is Walter R Obrien MD Inc A Medical Corporation located?
Walter R Obrien MD Inc A Medical Corporation is located at 11710 Wilshire Blvd, Los Angeles, CA 90025. The listed phone number is (310) 477-7276.
What is Walter R Obrien MD Inc A Medical Corporation's specialty?
The primary specialty registered for this NPI is Family Medicine, specializing in Sports Medicine, with taxonomy code 207QS0010X.
Is Walter R Obrien MD Inc A Medical Corporation enrolled in Medicare?
Yes. Walter R Obrien MD Inc A Medical Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Walter R Obrien MD Inc A Medical Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Walter R Obrien MD Inc A Medical Corporation, in Orthopedic Surgery and Physical Therapist in Private Practice. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Walter R Obrien MD Inc A Medical Corporation was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Walter Obrien Md Inc A Medical Corporation · NPI 1851623029
Sports Medicine organization in Los Angeles, California. Organization record, active in the CMS NPPES registry since February 12, 2010.
## Identity
- **NPI:** 1851623029 (Entity type: Organization)
- **Enumerated:** February 12, 2010
- **Primary specialty:** Family Medicine - Sports Medicine · taxonomy 207QS0010X
- **Legal business name:** Walter R Obrien Md Inc A Medical Corporation
- **Organization subpart:** No
- **Authorized official:** Walter O'brien, OWNER
## Practice location
- **Address:** 11710 WILSHIRE BLVD, Los Angeles, CA 90025-1503
- **Phone:** (310) 477-7276 · **Fax:** (310) 477-5148
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 2 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Orthopedic Surgery (1), Physical Therapist in Private Practice (1); 2 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 7, 2023
- **Other identifiers:** Medicaid 00G631931 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1851623029) · Data from the CMS NPPES public registry.