Quick answers
- Which hospitals does John S. To work at?
- Medicare's official clinician data lists John S. To at 4 hospitals: Dickinson County Memorial Hospital, Marshfield Medical Center, Marshfield Medical Center - Rice Lake and Marshfield Medical Center - Weston. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John S. To see patients?
- Medicare's clinician data lists 5 practice locations, including Marshfield, WI, Chippewa Falls, WI and Iron Mountain, MI. Call before your visit to confirm the address.
- What is John S. To's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does John S. To accept Medicare assignment?
- Yes. Medicare's clinician data says John S. To 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 S. To?
- (715) 387-5511, as listed in official Medicare / NPI Registry data.
- What is John S. To's NPI number?
- 1346214715. 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 S. To works
Medicare's Facility Affiliation Data lists John S. To at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Dickinson County Memorial HospitalIron Mountain, MI · Acute Care Hospital · CCN 230055
- Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · CCN 520037
- Marshfield Medical Center - Rice LakeRice Lake, WI · Acute Care Hospital · CCN 520011
- Marshfield Medical Center - WestonWeston, WI · Acute Care Hospital · CCN 520202
Practice locations
Addresses where John S. To is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 12961 27th AveChippewa Falls, WI 54729 (715) 738‑3700
- 1711 S Stephenson AveIron Mountain, MI 49801 (906) 776‑5810
- 1711 S Stephenson Ave, Suite 305Iron Mountain, MI 49801 (906) 776‑5250
- 1721 S Stephenson AveIron Mountain, MI 49801 (906) 774‑1313
Group practices
Medicare enrollment lists John S. To as a member of these groups (CMS data updated 2026-10-02).
- MCHS Hospitals Inc1,197 clinicians in the group
- Dickinson County Healthcare System101 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Southern California Keck School Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346214715 |
| 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