Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Raymond Charles Tan, MD

Radiation Oncology Physician in Fresno, CA · enumerated 2005 · practices at Cancer Therapy Medical Group Inc.

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

National Provider Identifier

1104809946

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Registry record

Entity type Individual (Type 1)

Name Raymond Charles Tan

Credential MD

Sex Male

Practice address Fresno, CA, 93720

Phone (559) 437-1000

Fax (559) 437-3870

Enumeration date Nov 25, 2005

Last updated in NPPES Feb 24, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License A73252 (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
OOA732520	Other	CA	BLUE SHIELD
OOA732520	Other	CA	MEDICARE ID

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

How do I verify Raymond Tan's NPI record?

Cross-check NPI 1104809946 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1104809946 active?

Yes, as of the latest NPPES snapshot, NPI 1104809946 is active (record last updated 2017-02-24).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-24.