Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Geoffrey Stuart Tompkins, M.D.

Specialist in Santa Rosa, CA · enumerated 2006.

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

National Provider Identifier

1255427050

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Registry record

Entity type Individual (Type 1)

Name Dr. Geoffrey Stuart Tompkins

Credential M.D.

Sex Male

Practice address 208 Concourse Blvd, #1, Santa Rosa, CA, 95403

Phone (707) 544-3400

Fax (707) 544-0137

Enumeration date Oct 5, 2006

Last updated in NPPES Jun 30, 2020

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G76351 (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
00G763510	Medicaid	CA	-

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 Geoffrey Tompkins?

Geoffrey Tompkins is registered in NPPES with the primary taxonomy of Specialist. 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 2020-06-30.