Quick answers
- Which hospitals does Jonathan S. Treisman work at?
- Medicare's official clinician data lists Jonathan S. Treisman at 5 hospitals: Ascension All Saints Hospital, Ascension Columbia St Marys Hospital Milwaukee, Ascension SE Wisconsin Hospital, Ascension St Francis Hospital and Aurora St Lukes Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jonathan S. Treisman see patients?
- Medicare's clinician data lists 1 practice location in Franklin, WI. Call before your visit to confirm the address.
- What is Jonathan S. Treisman's specialty?
- Medicare lists Medical Oncology as the primary specialty, and also Hematology/Oncology and Internal Medicine.
- Does Jonathan S. Treisman accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan S. Treisman 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 Jonathan S. Treisman?
- (414) 427-2360, as listed in official Medicare / NPI Registry data.
- What is Jonathan S. Treisman's NPI number?
- 1699778860. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jonathan S. Treisman works
Medicare's Facility Affiliation Data lists Jonathan S. Treisman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension All Saints HospitalRacine, WI · Acute Care Hospital · CCN 520096
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI · Acute Care Hospital · CCN 520051
- Ascension SE Wisconsin HospitalMilwaukee, WI · Acute Care Hospital · CCN 520136
- Ascension St Francis HospitalMilwaukee, WI · Acute Care Hospital · CCN 520078
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · CCN 520138
Practice locations
Addresses where Jonathan S. Treisman is enrolled with Medicare (CMS data updated 2026-10-02).
- 7410 W Rawson AveFranklin, WI 53132 (414) 427‑2360
Group practices
Medicare enrollment lists Jonathan S. Treisman as a member of this group (CMS data updated 2026-10-02).
- Ascension Medical Group-Southeast Wisconsin Inc545 clinicians in the group
Specialties
- Medical Oncologyprimary
- Hematology/Oncologyalso
- Internal Medicinealso
Other oncologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699778860 |
| 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