Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David John Martin, M.D.

Urology Physician in Santa Rosa, CA · enumerated 2005.

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

National Provider Identifier

1225036320

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Registry record

Entity type Individual (Type 1)

Name David John Martin

Credential M.D.

Sex Male

Practice address 4415 Sonoma Hwy, Suite A, Santa Rosa, CA, 95409

Phone (707) 537-2070

Fax (707) 537-9696

Enumeration date Jul 12, 2005

Last updated in NPPES Jul 23, 2007

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License A82729 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
GR0067920	Medicaid	CA	-
P00051386	Other	-	RR MEDICARD

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

What specialty is David Martin?

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

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-23.