Quick answers
- Which hospitals does John C. Rockwell work at?
- Medicare's official clinician data lists John C. Rockwell at 2 hospitals: Mercy Health System Corp and Mercy Walworth Hospital & Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John C. Rockwell see patients?
- Medicare's clinician data lists 2 practice locations, including Janesville, WI and Lake Geneva, WI. Call before your visit to confirm the address.
- What is John C. Rockwell's specialty?
- Medicare lists Optometry as the primary specialty.
- Does John C. Rockwell accept Medicare assignment?
- Yes. Medicare's clinician data says John C. Rockwell 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 John C. Rockwell's NPI number?
- 1154402089. 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. Rockwell works
Medicare's Facility Affiliation Data lists John C. Rockwell at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Health System CorpJanesville, WI · Acute Care Hospital · CCN 520066
- Mercy Walworth Hospital & Medical CenterLake Geneva, WI · Critical Access Hospital · CCN 521357
Practice locations
Addresses where John C. Rockwell is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Mineral Point AveJanesville, WI 53548
- N2950 State Rd, Suite 67Lake Geneva, WI 53147
Group practices
Medicare enrollment lists John C. Rockwell as a member of this group (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Janesville
Clinicians with the same Medicare primary specialty in Janesville, WI — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Illinois College Of Optometry At Chicago |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154402089 |
| 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