Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Fan Zhang, MD

Medical Oncology Physician in Santa Rosa, CA · enumerated 2006.

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

National Provider Identifier

1619051695

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Registry record

Entity type Individual (Type 1)

Name Fan Zhang

Credential MD

Sex Male

Practice address 401 Bicentennial Way, Santa Rosa, CA, 95403

Phone (707) 571-4000

Enumeration date Oct 25, 2006

Last updated in NPPES Mar 5, 2026

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License A81734 (CA) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 81734 (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
00A817340	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.

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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 Fan Zhang?

Fan Zhang is registered in NPPES with the primary taxonomy of Medical Oncology 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 2026-03-05.