Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lisa Marie Irwin

Peer Specialist in Fullerton, CA · enumerated 2016.

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

National Provider Identifier

1033578299

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Registry record

Entity type Individual (Type 1)

Name Lisa Marie Irwin

Sex Female

Practice address 401 Imperial Hwy, Fullerton, CA, 92835

Phone (714) 447-7000

Fax (714) 447-7003

Enumeration date Feb 16, 2016

Last updated in NPPES Jun 17, 2025

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
1033578299	Other	CA	NON-BILLABLE

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 Lisa Irwin?

Lisa Irwin is registered in NPPES with the primary taxonomy of Peer Specialist. 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 2025-06-17.