William Ziarnik
Internal Medicine Physician · Tucson, AZ
William Ziarnik is an internal medicine physician with a practice address in Tucson, Arizona, and NPI 1619072501, issued on Sep 14, 2006. Check the license on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- William Ziarnik
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G76194 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2945 W Ina RD, Tucson, AZ 85741
- Phone
- (520) 219-2418
- Enumerated
- Sep 14, 2006
- Record last updated
- Jun 1, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (520) 219-2332
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 2945 W Ina RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathleen Altman, PACPhysician Assistant1912932096
- Farah Anwar, MDStudent in an Organized Health Care Education/Training Program1972351898
- Justin Bablitz, DOStudent in an Organized Health Care Education/Training Program1538008529
- Iqra ChatthaStudent in an Organized Health Care Education/Training Program1902745912
- Dani FarhatInternal Medicine Physician1609230937
- Swathi Galidevara, MDStudent in an Organized Health Care Education/Training Program1245088111
Verify William Ziarnik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
36 Medicare Part D claims for 16 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William Ziarnik among 2,853 internal medicine physician records in Arizona
William Ziarnik is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2010 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
651 internal medicine physician records list a practice address in Tucson
They are 651 of the 18,788 NPPES records with a practice address in Tucson, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Tucson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Adam Boyer, MDTucson, AZ 857411760440317
- Patricia Carter, MDTucson, AZ 857411780688689
- David Gates, MDTucson, AZ 857411750346565
- Paul Gregory, MDTucson, AZ 857411255397790
- Terry Hargrove, MDTucson, AZ 857411336117092
- Jocelyn Hendricks, D.O.Tucson, AZ 857411497742068
- Brian Mayernick, MDTucson, AZ 857411114916384
- Rebecca Nara, M.D.Tucson, AZ 857411083602700
Common questions
What is William Ziarnik's NPI number?
William Ziarnik's National Provider Identifier (NPI) is 1619072501, issued on Sep 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Ziarnik located?
The NPPES record lists a practice address at 2945 W Ina RD, Tucson, AZ, 85741. Phone: (520) 219-2418. Providers update this record themselves, so call before visiting.
How can I verify William Ziarnik's license?
Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Ziarnik prescribe under Medicare Part D?
In 2024, William Ziarnik had 36 Medicare Part D claims for 16 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.