Quick answers
- Does Margaret Alvarez accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret Alvarez accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Margaret Alvarez's NPI number?
- 1578775078. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Margaret Alvarez works
Medicare's Facility Affiliation Data lists Margaret Alvarez at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Aspirus Eagle River HospitalEagle River, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521300
- Aspirus Ironwood HospitalIronwood, MI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 231333
- Aspirus Rhinelander HospitalRhinelander, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520019
- Aspirus Wausau HospitalWausau, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520030
- Howard Young Medical CenterWoodruff, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520091
Practice locations
Addresses where Margaret Alvarez is enrolled with Medicare (CMS data updated October 2, 2026).
- 1660 Sue Alan DrWittenberg, WI 54499 (715) 253‑2110
- 2251 N Shore DrRhinelander, WI 54501 (715) 361‑2000
- 2251 N Shore Dr, Suite 100Rhinelander, WI 54501
- 240 Maple StWoodruff, WI 54568 (715) 356‑8140
Group practices
Medicare enrollment lists Margaret Alvarez as a member of this group (CMS data updated October 2, 2026).
- Aspirus Rhinelander and Tomahawk Hospitals and Clinics, Inc.574 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Wittenberg
Clinicians with the same Medicare primary specialty in Wittenberg, WI — not a recommendation.
Other clinicians in Aspirus Rhinelander and Tomahawk Hospitals and Clinics, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| School | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2000 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578775078 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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