Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. David M. Marquis, D.C.

Chiropractor in Arroyo Grande, CA · enumerated 2006.

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

National Provider Identifier

1205932365

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Registry record

Entity type Individual (Type 1)

Name Dr. David M. Marquis

Credential D.C.

Sex Male

Practice address 260 Station Way, Suite A, Arroyo Grande, CA, 93420

Phone (805) 581-3442

Fax (805) 581-3443

Enumeration date Sep 16, 2006

Last updated in NPPES Oct 25, 2007

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License DC 24827 (CA) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is David Marquis?

David Marquis is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-25.