Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marc Forrest, D.O.

General Practice Physician in Calabasas, CA · enumerated 2005.

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

National Provider Identifier

1801873070

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Registry record

Entity type Individual (Type 1)

Name Marc Forrest

Credential D.O.

Sex Male

Practice address 23622 Calabasas Rd, Ste 250, Calabasas, CA, 91302

Phone (818) 591-3435

Enumeration date Dec 28, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 20A7880 (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.

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Frequently asked questions

How do I verify Marc Forrest's NPI record?

Cross-check NPI 1801873070 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1801873070 active?

Yes — as of the latest NPPES snapshot, NPI 1801873070 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.