Quick answers
- Which hospitals does John Alexander work at?
- Medicare's official clinician data lists John Alexander at 4 hospitals: OSF Saint Elizabeth MDL Ctr, OSF Saint Katharine Medical Center, Saint Anthony Medical Center and The Monroe Clinic. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Alexander see patients?
- Medicare's clinician data lists 2 practice locations, including Monroe, WI and Rockford, IL. Call before your visit to confirm the address.
- What is John Alexander's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does John Alexander accept Medicare assignment?
- Yes. Medicare's clinician data says John Alexander 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 Alexander?
- (608) 324-2000, as listed in official Medicare / NPI Registry data.
- What is John Alexander's NPI number?
- 1144256017. 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 Alexander works
Medicare's Facility Affiliation Data lists John Alexander at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- OSF Saint Elizabeth MDL CtrPeru, IL · Acute Care Hospital · CCN 140110
- OSF Saint Katharine Medical CenterDixon, IL · Acute Care Hospital · CCN 140012
- Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · CCN 140233
- The Monroe ClinicMonroe, WI · Acute Care Hospital · CCN 520028
Practice locations
Addresses where John Alexander is enrolled with Medicare (CMS data updated 2026-10-02).
- 515 22nd AveMonroe, WI 53566 (608) 324‑2000
- 5666 E State StRockford, IL 61108 (815) 921‑8929
Group practices
Medicare enrollment lists John Alexander as a member of these groups (CMS data updated 2026-10-02).
- OSF Multi-Specialty Group2,114 clinicians in the group
- The Monroe Clinic, Inc.199 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1144256017 |
| 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