Quick answers
- Which hospitals does Nathaniel J. Stewart work at?
- Medicare's official clinician data lists Nathaniel J. Stewart at 5 hospitals: Aspirus Medford Hospital & Clinics, Inc, Aspirus Stanley Hospital, Cumberland Memorial Hospital, Marshfield Medical Center - Eau Claire and Oakleaf Surgical Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nathaniel J. Stewart see patients?
- Medicare's clinician data lists 3 practice locations, including Spooner, WI, Altoona, WI and Chippewa Falls, WI. Call before your visit to confirm the address.
- What is Nathaniel J. Stewart's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Nathaniel J. Stewart accept Medicare assignment?
- Yes. Medicare's clinician data says Nathaniel J. Stewart 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 Nathaniel J. Stewart?
- (715) 635-3979, as listed in official Medicare / NPI Registry data.
- What is Nathaniel J. Stewart's NPI number?
- 1225064017. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nathaniel J. Stewart works
Medicare's Facility Affiliation Data lists Nathaniel J. Stewart at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aspirus Medford Hospital & Clinics, IncMedford, WI · Critical Access Hospital · CCN 521324
- Aspirus Stanley HospitalStanley, WI · Critical Access Hospital · CCN 521311
- Cumberland Memorial HospitalCumberland, WI · Critical Access Hospital · CCN 521353
- Marshfield Medical Center - Eau ClaireEau Claire, WI · Acute Care Hospital · CCN 520210
- Oakleaf Surgical HospitalAltoona, WI · Acute Care Hospital · CCN 520196
Practice locations
Addresses where Nathaniel J. Stewart is enrolled with Medicare (CMS data updated 2026-10-02).
- 112 Ash St, Suite ASpooner, WI 54801 (715) 635‑3979
- 1200 Oakleaf Way, AAltoona, WI 54720 (715) 832‑1400
- 757 Lakeland Dr BChippewa Falls, WI 54729 (715) 723‑8514
Group practices
Medicare enrollment lists Nathaniel J. Stewart as a member of these groups (CMS data updated 2026-10-02).
- Advantage Physical Therapy and Sports Rehab, LLC294 clinicians in the group
- Chippewa Valley Orthopedics and Sports Medicine Clinic SC32 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Spooner
Clinicians with the same Medicare primary specialty in Spooner, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225064017 |
| 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