Quick answers
- Which hospitals does Jonathan Ehrhardt work at?
- Medicare's official clinician data lists Jonathan Ehrhardt at 5 hospitals: Edgerton Hospital and Health Services, Javon Bea Hospital, Mercy Health System Corp, Mercy Walworth Hospital & Medical Center and Mercyhealth Hospital & Physician Clinic-Crystal LA…. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jonathan Ehrhardt see patients?
- Medicare's clinician data lists 18 practice locations, including Janesville, WI, Delavan, WI and Edgerton, WI. Call before your visit to confirm the address.
- What is Jonathan Ehrhardt's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Jonathan Ehrhardt accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan Ehrhardt 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 Ehrhardt?
- (262) 728-4301, as listed in official Medicare / NPI Registry data.
- What is Jonathan Ehrhardt's NPI number?
- 1639205289. 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 Ehrhardt works
Medicare's Facility Affiliation Data lists Jonathan Ehrhardt at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Edgerton Hospital and Health ServicesEdgerton, WI · Critical Access Hospital · CCN 521319
- Javon Bea HospitalRockford, IL · Acute Care Hospital · closed, according to its website · CCN 140239
- Mercy Health System CorpJanesville, WI · Acute Care Hospital · CCN 520066
- Mercy Walworth Hospital & Medical CenterLake Geneva, WI · Critical Access Hospital · CCN 521357
- Mercyhealth Hospital & Physician Clinic-Crystal LA…Crystal Lake, IL · Acute Care Hospital · CCN 140308
Practice locations
Addresses where Jonathan Ehrhardt is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 18; the Medicare profile lists all.
- 1000 Mineral Point AveJanesville, WI 53548
- 1038 E Geneva StDelavan, WI 53115 (262) 728‑4301
- 217 N Main StEdgerton, WI 53534 (608) 884‑9431
- 2310 1st Ctr AveBrodhead, WI 53520 (608) 897‑8664
- 2825 Prairie AveBeloit, WI 53511 (608) 363‑5500
Group practices
Medicare enrollment lists Jonathan Ehrhardt as a member of these groups (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
- Rockford Health Physicians521 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Janesville
Clinicians with the same Medicare primary specialty in Janesville, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639205289 |
| 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