Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Brock Allen Mason, D.O.

Aerospace Medicine Physician in Santa Maria, CA · enumerated 2014.

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

National Provider Identifier

1821408931

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Registry record

Entity type Individual (Type 1)

Name Brock Allen Mason

Credential D.O.

Sex Male

Practice address Santa Maria, CA, 93454

Phone (480) 209-3565

Enumeration date Apr 29, 2014

Last updated in NPPES Jun 17, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 19625 (CA) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License SL1008 (NV) Secondary

2083A0100X Aerospace Medicine Physician Allopathic & Osteopathic Physicians · License 006745 (AZ) 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

Is NPI 1821408931 active?

Yes, as of the latest NPPES snapshot, NPI 1821408931 is active (record last updated 2022-06-17).

How do I verify Brock Mason's NPI record?

Cross-check NPI 1821408931 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 2022-06-17.