WILLIAM S HAMRA M.D.
NPI 1134445596
Pediatrics in Riverside, CA

Q: What is William Hamra's NPI number?

The NPI number for William Hamra is 1134445596. It was assigned to this individual provider in the NPPES registry on April 10, 2010.

Q: What is William Hamra's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for William Hamra was last updated on April 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.

Active since April 10, 2010PECOS EnrolledAccepts Medicare Assignment

6405 DAY ST, RIVERSIDE, CA 92507(951) 697-5432(951) 697-5471 Get Directions Write a Review

NPPES record last updated: April 14, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 13, 2024, Apr 19, 2018 (2 updates tracked since 2018).

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About William S Hamra M.d. NPPES

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

WILLIAM S HAMRA M.D. (NPI 1134445596) is an individual pediatrics provider in Riverside, California, licensed in California (A120675) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS, maintains a secondary practice location in Loma Linda, and is a graduate of Loma Linda University School Of Medicine (2010).

NPPES Registry Identity

NPI1134445596

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameWILLIAM S HAMRACredential: M.D.

Location Address6405 DAY STRiverside, CA 92507-0901

Mailing Address6405 Day StRiverside, CA 92507-0901 · (951) 697-5432 · Fax (951) 697-5471

Phone(951) 697-5432

Fax(951) 697-5471

Sole ProprietorNo

Medical School CMSLoma Linda University School Of MedicineGraduated 2010

Enumeration DateApril 10, 2010

Last NPPES UpdateApril 14, 20252 updates tracked since enumeration

NPPES CertifiedApril 14, 2025

✔ NPI 1134445596 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in CA · A120675

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

6405 DAY ST, Riverside, CA 92507

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Secondary Practice Location 1

Location 111234 Anderson St, GME Office CP 21005Loma Linda, CA 92354-2804 · Phone (909) 583-3850

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William S Hamra M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4082856927

PECOS Enrollment IDI20130806000548

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 Reassignments

Medicare enrollment records show William Hamra reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Riverside Medical Clinic, Inc

Same address

Family Medicine

6405 DAY ST
Riverside, CA 92507

Reassigned Medicare billing, California enrollment
349 clinicians in this Medicare group

NPI 1780782557 (951) 683-6370

Faculty Physicians And Surgeons Of Llusm

1.0 mi

Ophthalmology

23000 ATLANTIC CIR
Moreno Valley, CA 92553

Reassigned Medicare billing, California enrollment
2,584 clinicians in this Medicare group

NPI 1437555612 (909) 558-3111

County Of Riverside

1.3 mi

Community/Behavioral Health

23119 COTTONWOOD AVE, BLDG A 110
Moreno Valley, CA 92553

Reassigned Medicare billing, California enrollment
336 clinicians in this Medicare group

NPI 1194890541 (951) 413-5678

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 92507 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

$91.88 typical visit price

range $59.60 – $179.42

Typical copayment $22.97 (range $14.90 – $44.85)

Most-billed visit code 99203

Established Patient

$104.64 typical visit price

range $19.37 – $146.42

Typical copayment $26.16 (range $4.84 – $36.60)

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.

MARJORIE TERESA WIMMER MD

Internal Medicine