John R. Zandt, M.D.
Hospitalist Physician · Waukesha, WI
John R. Zandt, M.D. is a hospitalist physician with a practice address in Waukesha, Wisconsin, and NPI 1104899798, issued on Feb 13, 2006. Check the license (Wisconsin 31971-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John R. Zandt
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 31971-020 WI
31971 WI
Self-reported in NPPES; status is on the state search - Practice location
- Waukesha Memorial Hospital-Hospitalist Program, Waukesha, WI 53188
- Phone
- (262) 928-1000
- Enumerated
- Feb 13, 2006
- Record last updated
- Nov 9, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (262) 928-6140
- Medicaid ID
- 31703600 WI
- Medicare enrollment
- Enrolled (PECOS I20110218000889); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 894 in Wisconsin → Look up another NPI →
Verify John R. Zandt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 31971-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average hospitalist physician in 2024
287 Medicare Part D claims for 99 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Pantoprazole Sodium31 claims
- Eliquis12 claims
- Losartan Potassium12 claims
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.
Bills Medicare through one group practice
- Columbia St Marys Hospital Milwaukee IncMequon, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John R. Zandt among 894 hospitalist physician records in Wisconsin
John R. Zandt, M.D. is one of 894 hospitalist physician records with a practice address in Wisconsin. 91% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 81% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 86% of these records are
- Graduated1988 · median 2011 among the 768 with a school on file
- Record last updated2011 · 29% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Wisconsin
There are 894 hospitalist physician records in Wisconsin.
All 894 in Wisconsin → Every provider in Waukesha → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Nabeel Beg, M.D.Waukesha, WI 531881396771069
- Kevin Chan, D.O.Waukesha, WI 531881619363017
- Viraj Dudhwala, M.D.Waukesha, WI 531881346413861
- Abraham Getenet, M.D.Waukesha, WI 531881760758569
- Harry Hostetler, M.D.Waukesha, WI 531881093775090
- Pratik Jivani, M.D.Waukesha, WI 531881598056756
- Poe Lwin, MDWaukesha, WI 531881427519230
- Krunalbhai PatelWaukesha, WI 531881154697845
Common questions
What is John R. Zandt, M.D.'s NPI number?
John R. Zandt, M.D.'s National Provider Identifier (NPI) is 1104899798, issued on Feb 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John R. Zandt, M.D. located?
The NPPES record lists a practice address at Waukesha Memorial Hospital-Hospitalist Program, Waukesha, WI, 53188. Phone: (262) 928-1000. Providers update this record themselves, so call before visiting.
How can I verify John R. Zandt, M.D.'s license?
NPPES lists Wisconsin license number 31971-020, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John R. Zandt, M.D. prescribe under Medicare Part D?
In 2024, John R. Zandt, M.D. had 287 Medicare Part D claims for 99 beneficiaries; the average among hospitalist physician prescribers was 521. 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.