Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark J Hollis, PA C

Physician Assistant in San Luis Obispo, CA · enumerated 2006 · practices at R Jeffrey Herten MD Inc.

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

National Provider Identifier

1902873748

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Registry record

Entity type Individual (Type 1)

Name Mark J Hollis

Credential PA C

Sex Male

Practice address 15 Santa Rosa Street, San Luis Obispo, CA, 93405

Phone (805) 541-2650

Fax (805) 541-4043

Enumeration date Mar 1, 2006

Last updated in NPPES Jul 13, 2010

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers Primary

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

How do I verify Mark Hollis's NPI record?

Cross-check NPI 1902873748 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1902873748 active?

Yes, as of the latest NPPES snapshot, NPI 1902873748 is active (record last updated 2010-07-13).

Other providers at this practice address

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R Jeffrey Herten MD Inc Dermatology Physician · San Luis Obispo, CA NPI 1730279944

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-13.