Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Paul Genser, M.D.

Pediatrics Physician in Tustin, CA · enumerated 2006.

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

National Provider Identifier

1154410629

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Registry record

Entity type Individual (Type 1)

Name Paul Genser

Credential M.D.

Sex Male

Practice address 1451 Irvine Blvd, Tustin, CA, 92780

Phone (714) 838-8878

Enumeration date Oct 12, 2006

Last updated in NPPES Feb 16, 2015

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License G32897 (CA) Primary

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

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 Paul Genser?

Paul Genser is registered in NPPES with the primary taxonomy of Pediatrics 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 2015-02-16.