Quick answers
- Does Lonna L. Grosskopf accept Medicare assignment?
- Yes. Medicare's clinician data says Lonna L. Grosskopf 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 Lonna L. Grosskopf see?
- In 2024, CMS data shows 346 Original Medicare patients and 383 services for Lonna L. Grosskopf. This counts Original Medicare only and measures volume, not quality.
- What is Lonna L. Grosskopf's NPI number?
- 1003856618. 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 Lonna L. Grosskopf, 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 | 346 |
|---|---|
| Services billed to Medicare | 383 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Anesthesia for lens surgery (00142)184 services
- Anesthesia for exam of colon using an endoscope (00812)70 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)49 services
- Anesthesia for procedure on small and large bowel using an endoscope (00813)39 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)26 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 cholesterol68%
- High blood pressure64%
- Arthritis32%
- Diabetes23%
- Ischemic heart disease20%
- Chronic kidney disease17%
Hospitals where Lonna L. Grosskopf works
Medicare's Facility Affiliation Data lists Lonna L. Grosskopf 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.
- Marshfield Medical Center - Beaver Dam (MMC-BD)Beaver Dam, WI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 520076
- Marshfield Medical Center - MinocquaMinocqua, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520212
Practice locations
Addresses where Lonna L. Grosskopf is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 411 Westwood DrWausau, WI 54401 (715) 847‑2558
- 705 S University Ave, Mmc Beaver Dam Medical OfficesBeaver Dam, WI 53916 (920) 887‑7181
- 707 S University Ave, Mmc Beaver Dam HospitalBeaver Dam, WI 53916 (920) 887‑7181
- 9576 Hwy 70Minocqua, WI 54548 (715) 358‑1710
Group practices
Medicare enrollment lists Lonna L. Grosskopf as a member of these groups (CMS data updated October 2, 2026).
- MCHS Hospitals Inc1,197 clinicians in the group
- Aspirus Ironwood Hospital and Clinics Inc165 clinicians in the group
- Beaver Dam Community Hospitals Inc.62 clinicians in the group
- Gastrointestinal Associates S.C.42 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Wisconsin →
Other nurse anesthetists in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Other clinicians in MCHS Hospitals Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 1997 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003856618 |
| 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