Quick answers
- Which hospitals does Jack Geiger work at?
- Medicare's official clinician data lists Jack Geiger at 1 hospital: Froedtert Memorial Lutheran Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jack Geiger see patients?
- Medicare's clinician data lists 2 practice locations, including Milwaukee, WI. Call before your visit to confirm the address.
- What is Jack Geiger's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Jack Geiger accept Medicare assignment?
- Yes. Medicare's clinician data says Jack Geiger 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 Jack Geiger?
- (414) 805-3666, as listed in official Medicare / NPI Registry data.
- What is Jack Geiger's NPI number?
- 1437852803. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jack Geiger works
Medicare's Facility Affiliation Data lists Jack Geiger at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Froedtert Memorial Lutheran HospitalMilwaukee, WI · Acute Care Hospital · CCN 520177
Practice locations
Addresses where Jack Geiger is enrolled with Medicare (CMS data updated 2026-10-02).
- 8701 W Watertown PlankMilwaukee, WI 53226 (414) 805‑3666
- 8701 Watertown Plank Rd, Room 4041 MfrcMilwaukee, WI 53226 (414) 805‑3666
Group practices
Medicare enrollment lists Jack Geiger as a member of this group (CMS data updated 2026-10-02).
- The Medical College of Wisconsin Inc2,115 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Milwaukee
Clinicians with the same Medicare primary specialty in Milwaukee, WI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 2023 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437852803 |
| 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