Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. William Ziarnik

Individual provider Internal Medicine Physician · NPI 1619072501

Dr. William Ziarnik is an Internal Medicine Physician in Tucson, Arizona. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
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Practice location Address checks out

2945 W Ina Rd VA Northwest Tucson Clinic
Tucson, AZ 85741-2350 Not confirmed with CMS for 16 years — call before visiting
Phone: (520) 219-2418
Fax: (520) 219-2332
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G76194 (CA)

Record details

NPI number1619072501
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedSeptember 14, 2006
Last updated in NPPESJune 1, 2010

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients43
Services billed 135 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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