Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan E Shirman, DO

Addiction Medicine (Family Medicine) Physician in Oxnard, CA · enumerated 2019 · practices at Community Memorial Health System.

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

National Provider Identifier

1326606898

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Jonathan E Shirman

Credential DO

Sex Male

Practice address 3641 W 5th St, Oxnard, CA, 93030

Phone (805) 985-5505

Enumeration date May 30, 2019

Last updated in NPPES Oct 30, 2025

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 318974 (NY) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 20A22896 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Jonathan Shirman's NPI record?

Cross-check NPI 1326606898 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1326606898 active?

Yes, as of the latest NPPES snapshot, NPI 1326606898 is active (record last updated 2025-10-30).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-30.