Quick answers
- Which hospitals does John-Jeremiah Kretchy work at?
- Medicare's official clinician data lists John-Jeremiah Kretchy at 5 hospitals: Ascension Columbia St Marys Hospital Milwaukee, Aspirus Rhinelander Hospital, Aspirus Riverview Hospital & Clinics Inc, Aspirus Stevens Point Hospital & Clinics, Inc. and Aspirus Wausau Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John-Jeremiah Kretchy see patients?
- Medicare's clinician data lists 7 practice locations, including Appleton, WI, Rhinelander, WI and Milwaukee, WI. Call before your visit to confirm the address.
- What is John-Jeremiah Kretchy's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does John-Jeremiah Kretchy accept Medicare assignment?
- Yes. Medicare's clinician data says John-Jeremiah Kretchy accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John-Jeremiah Kretchy?
- (920) 738-2000, as listed in official Medicare / NPI Registry data.
- What is John-Jeremiah Kretchy's NPI number?
- 1487902805. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John-Jeremiah Kretchy works
Medicare's Facility Affiliation Data lists John-Jeremiah Kretchy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI · Acute Care Hospital · CCN 520051
- Aspirus Rhinelander HospitalRhinelander, WI · Acute Care Hospital · CCN 520019
- Aspirus Riverview Hospital & Clinics IncWisconsin Rapids, WI · Acute Care Hospital · CCN 520033
- Aspirus Stevens Point Hospital & Clinics, Inc.Stevens Point, WI · Acute Care Hospital · CCN 520002
- Aspirus Wausau HospitalWausau, WI · Acute Care Hospital · CCN 520030
Practice locations
Addresses where John-Jeremiah Kretchy is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1506 S Oneida StAppleton, WI 54915 (920) 738‑2000
- 2251 N Shore DrRhinelander, WI 54501 (715) 361‑2000
- 2301 N Lake DrMilwaukee, WI 53211 (414) 585‑1000
- 240 Maple StWoodruff, WI 54568 · Howard Young Medical Center Inc of Woodruff Wisconsin (715) 356‑8000
- 333 Pine Ridge BlvdWausau, WI 54401
Group practices
Medicare enrollment lists John-Jeremiah Kretchy as a member of these groups (CMS data updated 2026-10-02).
- Aspirus Rhinelander and Tomahawk Hospitals and Clinics, Inc.574 clinicians in the group
- Ascension Medical Group-Southeast Wisconsin Inc545 clinicians in the group
- Columbia St Marys Hospital Milwaukee Inc306 clinicians in the group
- Ascension Medical Group-Fox Valley Wisconsin, Inc259 clinicians in the group
- Aspirus Wausau Hospital Inc237 clinicians in the group
- Aspirus Stevens Point Hospital and Clinics, Inc.134 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Appleton
Clinicians with the same Medicare primary specialty in Appleton, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487902805 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians