Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Harold J Katzman Sr., MD

Ophthalmology Physician in Los Angeles, CA · enumerated 2006.

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

National Provider Identifier

1205859329

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Registry record

Entity type Individual (Type 1)

Name Dr. Harold J Katzman Sr.

Credential MD

Sex Male

Practice address 4403 S Vermont Ave, Los Angeles, CA, 90037

Phone (323) 232-1234

Fax (323) 232-3789

Enumeration date Jul 26, 2006

Last updated in NPPES Jan 16, 2015

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License G13945 (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
GR0101230	Medicaid	CA	-
GSD004850	Medicaid	CA	-

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Harold Katzman?

Harold Katzman is registered in NPPES with the primary taxonomy of Ophthalmology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-16.