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WILLIAM OPPENHEIM M.D.
NPI 1801962360
Orthopaedic Surgery - Pediatric Orthopaedic Surgery in Los Angeles, CA

Active since November 27, 2006PECOS Enrolled
10945 LE CONTE AVENUE, RM 3355 UBBEROTH BLDG DEPARTMENT OF ORTHOPAEDIC SURGERY, LOS ANGELES, CA 90095(310) 206-6345(310) 206-0063 Get Directions Write a Review

NPPES record last updated: June 14, 2011. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About William Oppenheim M.d. NPPES

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

WILLIAM OPPENHEIM M.D. (NPI 1801962360) is an individual pediatric orthopaedic surgery provider in Los Angeles, California, licensed in California (G20568) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801962360
Entity TypeIndividualMale
Primary Taxonomy207XP3100X
Provider Legal NameWILLIAM OPPENHEIMCredential: M.D.
Location Address10945 LE CONTE AVENUE, RM 3355 UBBEROTH BLDG DEPARTMENT OF ORTHOPAEDIC SURGERYLos Angeles, CA 90095-6902
Mailing AddressPo Box 56902, David Geffen School Of Medicine At UclaLos Angeles, CA 90095-0001 · (310) 206-6345 · Fax (310) 206-0063
Phone(310) 206-6345
Fax(310) 206-0063
Sole ProprietorNo
Enumeration DateNovember 27, 2006
Last NPPES UpdateJune 14, 2011
✔ NPI 1801962360 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Pediatric Orthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207XP3100X
License✔ Licensed in CA · G20568
Definition
An orthopedic surgeon who has additional training and experience in diagnosing, treating and managing musculoskeletal problems in infants, children and adolescents. These may include limb and spine deformities (such as club foot, scoliosis); gait abnormalities (limping); bone and joint infections; broken bones.
10945 LE CONTE AVENUE, Los Angeles, CA 90095
Open in Google Maps ↗

Other Identifiers 3

Medicaid00G205680CA
Medicare UPINA33442CA
Medicare ID-Type UnspecifiedWG20568DCA · Medicare Ppin #

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Oppenheim 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 William Oppenheim reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Regents Of The University Of California
0.1 mi
Orthopaedic Surgery
100 MEDICAL PLAZA SUITE 755
Los Angeles, CA 90095
  • Reassigned Medicare billing, California enrollment
  • 78 clinicians in this Medicare group
NPI 1528179793 (424) 206-2386

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 William Oppenheim's NPI number?

The NPI number for William Oppenheim is 1801962360. It was assigned to this individual provider in the NPPES registry on November 27, 2006.

Where is William Oppenheim located?

William Oppenheim practices at 10945 Le Conte Avenue Rm 3355 Ubberoth Bldg Department Of Orthopaedic Surgery, Los Angeles, CA 90095. The listed phone number is (310) 206-6345.

What is William Oppenheim's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Pediatric Orthopaedic Surgery, with taxonomy code 207XP3100X.

Is William Oppenheim enrolled in Medicare?

Yes. William Oppenheim is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William Oppenheim's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Oppenheim reassigns Medicare benefits to Regents Of The University Of California (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 William Oppenheim'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 William Oppenheim was last updated on June 14, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.