Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Leon Tsai, M.D.

Gastroenterology Physician in Tucson, AZ · enumerated 2005.

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

National Provider Identifier

1912983883

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Registry record

Entity type Individual (Type 1)

Name Dr. Leon Tsai

Credential M.D.

Sex Male

Practice address 7566 N La Cholla Blvd, Ste A, Tucson, AZ, 85741

Phone (520) 742-4139

Fax (520) 742-9618

Enumeration date Dec 21, 2005

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 29869 (AZ) 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
AZ0899000	Other	AZ	BLUE CROSS BLUE SHIELD AZ
633801	Medicaid	AZ	-
4116337	Other	AZ	AETNA
1Z6413	Other	AZ	HEALTHNET

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

Is NPI 1912983883 active?

Yes, as of the latest NPPES snapshot, NPI 1912983883 is active (record last updated 2007-07-09).

How do I verify Leon Tsai's NPI record?

Cross-check NPI 1912983883 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.