Quick answers
- Which hospitals does John C. Maynard work at?
- Medicare's official clinician data lists John C. Maynard at 4 hospitals: CGH Medical Center, OSF Saint Katharine Medical Center, Saint Anthony Medical Center and UW Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John C. Maynard see patients?
- Medicare's clinician data lists 1 practice location in Rockford, IL. Call before your visit to confirm the address.
- What is John C. Maynard's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does John C. Maynard accept Medicare assignment?
- Yes. Medicare's clinician data says John C. Maynard 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. Maynard?
- (815) 227-8300, as listed in official Medicare / NPI Registry data.
- What is John C. Maynard's NPI number?
- 1730180878. 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. Maynard works
Medicare's Facility Affiliation Data lists John C. Maynard at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CGH Medical CenterSterling, IL · Acute Care Hospital · CCN 140043
- OSF Saint Katharine Medical CenterDixon, IL · Acute Care Hospital · CCN 140012
- Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · CCN 140233
- UW HealthRockford, IL · Acute Care Hospital · CCN 140228
Practice locations
Addresses where John C. Maynard is enrolled with Medicare (CMS data updated 2026-10-02).
- 612 Roxbury RdRockford, IL 61107 (815) 227‑8300
Group practices
Medicare enrollment lists John C. Maynard as a member of this group (CMS data updated 2026-10-02).
- Rna of Rockford, PLLC18 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Rockford
Clinicians with the same Medicare primary specialty in Rockford, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1978 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1730180878 |
| 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