Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert R Martin, DDS

General Practice Dentistry in Napa, CA · enumerated 2006.

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

National Provider Identifier

1821190943

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert R Martin

Credential DDS

Sex Male

Practice address 3150 Beard Rd, Napa, CA, 94558

Phone (707) 255-6300

Fax (707) 256-7323

Enumeration date Sep 1, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 23127 (CA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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 1821190943 active?

Yes, as of the latest NPPES snapshot, NPI 1821190943 is active (record last updated 2007-07-08).

How do I verify Robert Martin's NPI record?

Cross-check NPI 1821190943 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Michael Young General Practice Dentistry · Napa, CA NPI 1144238403

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