Quick answers
- Which hospitals does Nathan C. Grunwald work at?
- Medicare's official clinician data lists Nathan C. Grunwald at 2 hospitals: Thedacare Regional Medical Center - Appleton Inc and Thedacare Regional Medical Center - Neenah. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nathan C. Grunwald see patients?
- Medicare's clinician data lists 10 practice locations, including Appleton, WI, Menasha, WI and Neenah, WI. Call before your visit to confirm the address.
- What is Nathan C. Grunwald's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Nathan C. Grunwald accept Medicare assignment?
- Yes. Medicare's clinician data says Nathan C. Grunwald 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.
- Does Nathan C. Grunwald offer telehealth?
- Medicare's clinician data says Nathan C. Grunwald offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Nathan C. Grunwald?
- (920) 730-3383, as listed in official Medicare / NPI Registry data.
- What is Nathan C. Grunwald's NPI number?
- 1073549887. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nathan C. Grunwald works
Medicare's Facility Affiliation Data lists Nathan C. Grunwald at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Thedacare Regional Medical Center - Appleton IncAppleton, WI · Acute Care Hospital · CCN 520160
- Thedacare Regional Medical Center - NeenahNeenah, WI · Acute Care Hospital · CCN 520045
Practice locations
Addresses where Nathan C. Grunwald is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 10; the Medicare profile lists all.
- 1818 N Meade StAppleton, WI 54911
- 1818 N Meade St Room, N255Appleton, WI 54911 (920) 730‑3383
- 2005 Midway RdMenasha, WI 54952 (920) 832‑8500
- 2500 E Capital DrAppleton, WI 54911
- 3 Neenah CtrNeenah, WI 54956
Group practices
Medicare enrollment lists Nathan C. Grunwald as a member of this group (CMS data updated 2026-10-02).
- Thedacare, Incorporated647 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Appleton
Clinicians with the same Medicare primary specialty in Appleton, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1073549887 |
| 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