Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Ziarnik

Internal Medicine Physician in Tucson, AZ · enumerated 2006.

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

National Provider Identifier

1619072501

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Registry record

Entity type Individual (Type 1)

Name Dr. William Ziarnik

Sex Male

Practice address 2945 W Ina Rd, Va Northwest Tucson Clinic, Tucson, AZ, 85741

Phone (520) 219-2418

Fax (520) 219-2332

Enumeration date Sep 14, 2006

Last updated in NPPES Jun 1, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G76194 (CA) Primary

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

Where does William Ziarnik practice?

The practice location on file with NPPES is in Tucson, AZ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Ziarnik?

The National Provider Identifier (NPI) for William Ziarnik is 1619072501, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-01.