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DR. WALTER R O'BRIEN M.D.
NPI 1346290814
Family Medicine - Sports Medicine in Los Angeles, CA

Active since May 12, 2006PECOS Enrolled
11600 WILSHIRE BLVD, SUITE 522, LOS ANGELES, CA 90025(310) 477-7276(310) 477-5148 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 7, 2023, May 22, 2020 (2 updates tracked since 2020).

About Dr. Walter R O'brien M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WALTER R O'BRIEN M.D. (NPI 1346290814) is an individual sports medicine provider in Los Angeles, California, licensed in California (G063193) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1346290814
Entity TypeIndividualMale
Primary Taxonomy207QS0010X
Provider Legal NameDR. WALTER R O'BRIENCredential: M.D.
Location Address11600 WILSHIRE BLVD, SUITE 522Los Angeles, CA 90025-5781
Mailing Address11710 Wilshire BlvdLos Angeles, CA 90025-1503 · (310) 477-7276 · Fax (310) 477-5148
Phone(310) 477-7276
Fax(310) 477-5148
Sole ProprietorNo
Enumeration DateMay 12, 2006
Last NPPES UpdateMarch 7, 20232 updates tracked since enumeration
NPPES CertifiedMay 22, 2020
✔ NPI 1346290814 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Sports MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QS0010X
License✔ Licensed in CA · G063193
Definition
A family medicine physician that is trained to be responsible for continuous care in the field of sports medicine, not only for the enhancement of health and fitness, but also for the prevention of injury and illness. A sports medicine physician must have knowledge and experience in the promotion of wellness and the prevention of injury. Knowledge about special areas of medicine such as exercise physiology, biomechanics, nutrition, psychology, physical rehabilitation, epidemiology, physical evaluation, injuries (treatment and prevention and referral practice) and the role of exercise in promoting a healthy lifestyle are essential to the practice of sports medicine. The sports medicine physician requires special education to provide the knowledge to improve the health care of the individual engaged in physical exercise (sports) whether as an individual or in team participation.
11600 WILSHIRE BLVD, Los Angeles, CA 90025
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Other Identifiers 1

Medicaid00G631931CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Walter R O'brien M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Walter O'brien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Walter R Obrien MD Inc A Medical Corporation
0.2 mi
Sports Medicine
11710 WILSHIRE BLVD
Los Angeles, CA 90025
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1851623029 (310) 477-7276

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90025 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MOHSEN M HAMZA M.D.
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
11600 WILSHIRE BLVD, SUITE # 420
LOS ANGELES, CA 90025
Los Angeles County (310) 477-7201
JASON CHAO PING CHEN PT, DPT
Physical Therapist
11600 WILSHIRE BLVD, 222
LOS ANGELES, CA 90025
Los Angeles County (310) 477-8622
PACIFIC COAST SPORTS MEDICINE
Orthopaedic Surgery
11600 WILSHIRE BLVD, SUITE 522
LOS ANGELES, CA 90025
Los Angeles County (310) 477-7276
LAURA CECILE ACKERMAN
Audiologist-Hearing Aid Fitter
11600 WILSHIRE BLVD, STE 114
LOS ANGELES, CA 90025
Los Angeles County (310) 477-1519
PREMIER HEALTHCARE AND SUPPLIES
Durable Medical Equipment & Medical Supplies
11600 WILSHIRE BLVD
LOS ANGELES, CA 90025
Los Angeles County (310) 444-2911
DR. HEATHER SHELLEY SILVERMAN M.D.
Psychiatry & Neurology (Psychiatry)
11600 WILSHIRE BLVD, SUITE 500
LOS ANGELES, CA 90025
Los Angeles County (310) 231-3510
DR. STEVEN ROSENBLATT
Acupuncturist
11600 WILSHIRE BLVD, SUITE 320
LOS ANGELES, CA 90025
Los Angeles County (310) 444-2911
BALESTRIERI PSYCHOLOGICAL SERVICES, P.C.
Psychologist
11600 WILSHIRE BLVD, SUITE 412
LOS ANGELES, CA 90025
Los Angeles County (310) 993-1664

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 O'brien's NPI number?

The NPI number for Walter O'brien is 1346290814. It was assigned to this individual provider in the NPPES registry on May 12, 2006.

Where is Walter O'brien located?

Walter O'brien practices at 11600 Wilshire Blvd Suite 522, Los Angeles, CA 90025. The listed phone number is (310) 477-7276.

What is Walter O'brien's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Sports Medicine, with taxonomy code 207QS0010X.

Is Walter O'brien enrolled in Medicare?

Yes. Walter O'brien is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Walter O'brien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Walter O'brien reassigns Medicare benefits to Walter R Obrien MD Inc A Medical Corporation (Los Angeles, CA). The 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 Walter O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Walter O'brien 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.