Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gary Nichols, M.D.

Internal Medicine Physician in Santa Rosa, CA · enumerated 2006 · practices at Sutter Medical Group of the Redwoods.

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

National Provider Identifier

1033201587

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Registry record

Entity type Individual (Type 1)

Name Gary Nichols

Credential M.D.

Sex Male

Practice address 2455 Summerfield Rd, Santa Rosa, CA, 95405

Phone (707) 308-2815

Fax (707) 573-5439

Enumeration date Sep 29, 2006

Last updated in NPPES Jul 10, 2019

Taxonomy & licenses

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 181851 (CA) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 181851 (CA) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 181851 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G73872 (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
CP059Z	Other	-	PTAN
G73872	Other	CA	STATE MEDICAL LICENSE

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 Gary Nichols?

Gary Nichols is registered in NPPES with the primary taxonomy of Internal Medicine Physician. 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 2019-07-10.