Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Hisham El-Bayar, M.D., F.A.C.S.

Surgery Physician in Orange, CA · enumerated 2005 · practices at Roy L Herndon MD Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1659376622

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Registry record

Entity type Individual (Type 1)

Name Dr. Hisham El-Bayar

Credential M.D., F.A.C.S.

Sex Male

Practice address Orange, CA, 92868

Phone (714) 835-8300

Fax (714) 835-8304

Enumeration date Jun 16, 2005

Last updated in NPPES Oct 26, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License A45299 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00A452991	Medicaid	CA	-
00A452991	Other	CA	BLUE CROSS/BLUE SHIELD

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Hisham El-Bayar's NPI record?

Cross-check NPI 1659376622 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1659376622 active?

Yes, as of the latest NPPES snapshot, NPI 1659376622 is active (record last updated 2009-10-26).

Other providers at this practice address

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Roy Herndon Internal Medicine Physician · Orange, CA NPI 1417928383 Melanie Irwin Pediatric Rehabilitation Medicine Physician · Orange, CA NPI 1518918358 Roy L Herndon MD Inc Internal Medicine Physician · Orange, CA NPI 1447433032

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-10-26.