Quick answers
- Which hospitals does John C. Christianson work at?
- Medicare's official clinician data lists John C. Christianson at 5 hospitals: Ascension All Saints Hospital, Ascension SE Wisconsin Hospital, Ascension St Francis Hospital, Aurora St Lukes Medical Center and West Allis Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John C. Christianson see patients?
- Medicare's clinician data lists 2 practice locations, including Franklin, WI and Milwaukee, WI. Call before your visit to confirm the address.
- What is John C. Christianson's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Infectious Disease.
- Does John C. Christianson accept Medicare assignment?
- Yes. Medicare's clinician data says John C. Christianson 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 C. Christianson?
- (414) 817-5800, as listed in official Medicare / NPI Registry data.
- What is John C. Christianson's NPI number?
- 1114021151. 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 C. Christianson works
Medicare's Facility Affiliation Data lists John C. Christianson 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 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
- West Allis Memorial HospitalWest Allis, WI · Acute Care Hospital · CCN 520139
Practice locations
Addresses where John C. Christianson is enrolled with Medicare (CMS data updated 2026-10-02).
- 10101 S 27th St 2nd FlFranklin, WI 53132 (414) 817‑5800
- 2025 W Oklahoma Ave, Suite 110Milwaukee, WI 53215 (414) 389‑2920
Specialties
- Internal Medicineprimary
- Infectious Diseasealso
Other internal medicine doctors in Franklin
Clinicians with the same Medicare primary specialty in Franklin, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114021151 |
| 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