JOHN R. ZANDT M.D.
NPI 1104899798
Hospitalist in Waukesha, WI
About John R. Zandt M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN R. ZANDT M.D. (NPI 1104899798) is an individual hospitalist provider in Waukesha, Wisconsin, licensed in Wisconsin (31971-020) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Ascension Columbia St Mary's Hospital Milwaukee, and is a graduate of University Of Wisconsin School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John R. Zandt M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show John Zandt reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Waukesha, WI 53188
- Reassigned Medicare billing, Wisconsin enrollment
- 81 clinicians in this Medicare group
Milwaukee, WI 53211
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Columbia St Marys Hospital Milwaukee Inc
- 856 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension Columbia St Mary's Hospital Milwaukee
Acute Care Hospitals · Milwaukee, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53188 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Zandt's NPI number?
The NPI number for John Zandt is 1104899798. It was assigned to this individual provider in the NPPES registry on February 13, 2006.
Where is John Zandt located?
John Zandt practices at Waukesha Memorial Hospital-Hospitalist Program 725 American Avenue Room 2036, Waukesha, WI 53188. The listed phone number is (262) 928-1000.
What is John Zandt's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is John Zandt enrolled in Medicare?
Yes. John Zandt is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Zandt's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Zandt reassigns Medicare benefits to 2 organizations: Apogee Medical Group Waukesha, Sc (Waukesha, WI) and Columbia St. Mary's Hospital Milwaukee Inc (Milwaukee, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Zandt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Zandt accept?
Health plans from Anthem Blue Cross and Blue Shield list John Zandt as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is John Zandt affiliated with any hospitals?
According to CMS data, John Zandt is affiliated with Ascension Columbia St Mary's Hospital Milwaukee.
When was this NPI record last updated?
The NPPES record for John Zandt was last updated on November 9, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John R. Zandt, M.D. · NPI 1104899798
Hospitalist physician in Waukesha, Wisconsin. Individual provider, active in the CMS NPPES registry since February 13, 2006.
## Identity
- **NPI:** 1104899798 (Entity type: Individual)
- **Enumerated:** February 13, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 31971-020 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** WAUKESHA MEMORIAL HOSPITAL-HOSPITALIST PROGRAM, 725 AMERICAN AVENUE ROOM 2036, Waukesha, WI 53188
- **Phone:** (262) 928-1000 · **Fax:** (262) 928-6140
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Apogee Medical Group Waukesha, Sc (NPI 1528544608, Waukesha, WI); Columbia St. Mary's Hospital Milwaukee Inc (NPI 1225071491, Milwaukee, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Wisconsin School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** November 9, 2011
- **Other identifiers:** Medicare UPIN E82928 (WI); Medicaid 31703600 (WI); Medicare PIN 683750683 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1104899798) · Data from the CMS NPPES public registry.