Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Jeannine A. O'Brien, PA-C

Surgical Physician Assistant in Carmichael, CA · enumerated 2006.

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

National Provider Identifier

1598879793

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Registry record

Entity type Individual (Type 1)

Name Mrs. Jeannine A. O'Brien

Credential PA-C

Sex Female

Practice address 6555 Coyle Ave, Suite 235, Carmichael, CA, 95608

Phone (916) 200-0087

Enumeration date Aug 18, 2006

Last updated in NPPES May 9, 2016

Taxonomy & licenses

363AS0400X Surgical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA14186 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
P00185911	Other	CA	RAILROAD MEDICARE

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

Is NPI 1598879793 active?

Yes, as of the latest NPPES snapshot, NPI 1598879793 is active (record last updated 2016-05-09).

How do I verify Jeannine O'Brien's NPI record?

Cross-check NPI 1598879793 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-09.