Quick answers
- Does Alexander F. Grunenwald accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander F. Grunenwald 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.
- How many Medicare patients does Alexander F. Grunenwald see?
- In 2024, CMS data shows 160 Original Medicare patients and 175 services for Alexander F. Grunenwald. This counts Original Medicare only and measures volume, not quality.
- What is Alexander F. Grunenwald's NPI number?
- 1992243984. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Alexander F. Grunenwald, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 160 |
|---|---|
| Services billed to Medicare | 175 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)71 services
- Emergency department visit with moderate level of medical decision making (99284)67 services
- Critical care, first 30-74 minutes (99291)18 services
- Emergency department visit with low level of medical decision making (99283)11 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol73%
- Chronic kidney disease48%
- Arthritis43%
- Heart failure36%
- Anxiety35%
Hospitals where Alexander F. Grunenwald works
Medicare's Facility Affiliation Data lists Alexander F. Grunenwald 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.
- Ladd Memorial HospitalOsceola, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521318
- Mercy HospitalCoon Rapids, MN · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 240115
- Mile Bluff Medical CenterMauston, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520109
- Saint Francis Hospital MuskogeeMuskogee, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370025
- Saint Francis Hospital South, LLCTulsa, OK · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 370218
Practice locations
Addresses where Alexander F. Grunenwald is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1050 Division StMauston, WI 53948 (608) 847‑6161
- 14585 Hazel Dell PkwyCarmel, IN 46033 (317) 214‑5030
- 2251 N Shore DrRhinelander, WI 54501 (715) 361‑2000
- 300 Rockefeller DrMuskogee, OK 74401 (918) 682‑5501
- 401 W Mohawk DrTomahawk, WI 54487 (715) 453‑7200
Group practices
Medicare enrollment lists Alexander F. Grunenwald as a member of these groups (CMS data updated October 2, 2026).
- Aspirus Rhinelander and Tomahawk Hospitals and Clinics, Inc.574 clinicians in the group
- Emergency Physicians Professional Association282 clinicians in the group
- Riverview Hospital211 clinicians in the group
- Ies ER Oklahoma LLC143 clinicians in the group
- Mile Bluff Medical Center Inc87 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Mauston
Clinicians with the same Medicare primary specialty in Mauston, 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 | DO |
|---|---|
| Medical school | Kansas City University Of Med & Biosciences, College Of Osteo Med |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1992243984 |
| 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
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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