LONNA L GROSSKOPF CRNA
NPI 1003856618
Nurse Anesthetist, Certified Registered in Woodruff, WI
About Lonna L Grosskopf Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LONNA L GROSSKOPF CRNA (NPI 1003856618) is an individual nurse anesthetist, certified registered in Woodruff, Wisconsin, licensed in Wisconsin (1152) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center - Beaver Dam (mmc-bd), and maintains a secondary practice location in Minocqua.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Lonna L Grosskopf Crna is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
13Medicare enrollment records show Lonna Grosskopf reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Woodruff, WI 54568
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Howard Young Medical Center Inc Of Woodruff Wisconsin
- Also billed through NPI 1306898838 (Wisconsin)
- 358 clinicians in this Medicare group
Minocqua, WI 54548
- Reassigned Medicare billing, Wisconsin enrollment
- 2,476 clinicians in this Medicare group
Rhinelander, WI 54501
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Langlade Hospital - Hotel Dieu Of St Joseph Of Antigo Wisconsin
- Also billed through NPI 1821151366 (Wisconsin)
- 321 clinicians in this Medicare group
Park Falls, WI 54552
- Reassigned Medicare billing, Wisconsin enrollment
- 1,351 clinicians in this Medicare group
Ironwood, MI 49938
- Reassigned Medicare billing, Michigan enrollment
- 244 clinicians in this Medicare group
Ironwood, MI 49938
- Reassigned Medicare billing, Michigan enrollment
- 264 clinicians in this Medicare group
Wausau, WI 54401
- Reassigned Medicare billing, Wisconsin enrollment
- 54 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Stevens Point, WI 54481
- Reassigned Medicare billing, Wisconsin enrollment
- 619 clinicians in this Medicare group
Chetek, WI 54728
- Reassigned Medicare billing, Wisconsin enrollment
- 1,616 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Marshfield Medical Center - Beaver Dam (mmc-Bd)
Acute Care Hospitals · Beaver Dam, WIMarshfield Medical Center - Minocqua
Acute Care Hospitals · Minocqua, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54568 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WOODRUFF, WI 54568
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Lonna Grosskopf's NPI number?
The NPI number for Lonna Grosskopf is 1003856618. It was assigned to this individual provider in the NPPES registry on June 8, 2006.
Where is Lonna Grosskopf located?
Lonna Grosskopf practices at 240 Maple St, Woodruff, WI 54568. The listed phone number is (715) 356-8000.
What is Lonna Grosskopf's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Lonna Grosskopf enrolled in Medicare?
Yes. Lonna Grosskopf is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Lonna Grosskopf's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lonna Grosskopf reassigns Medicare benefits to 13 organizations: The Howard Young Medical Center, Inc. (Woodruff, WI), Mchs Hospitals Inc (Minocqua, WI), Aspirus Medical Group, Inc. (Rhinelander, WI), Flambeau Hospital Inc (Park Falls, WI), Aspirus Ironwood Hospital & Clinics, Inc. (Ironwood, MI) and 8 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lonna Grosskopf's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lonna Grosskopf accept?
Health plans from Sanford Health Plan list Lonna Grosskopf as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Lonna Grosskopf affiliated with any hospitals?
According to CMS data, Lonna Grosskopf is affiliated with Marshfield Medical Center - Beaver Dam (mmc-Bd) and Marshfield Medical Center - Minocqua.
When was this NPI record last updated?
The NPPES record for Lonna Grosskopf was last updated on February 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Lonna L Grosskopf, CRNA · NPI 1003856618
Nurse Anesthetist, Certified Registered physician in Woodruff, Wisconsin. Individual provider, active in the CMS NPPES registry since June 8, 2006.
## Identity
- **NPI:** 1003856618 (Entity type: Individual)
- **Enumerated:** June 8, 2006
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 1152 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 240 MAPLE ST, Woodruff, WI 54568-0470
- **Phone:** (715) 356-8000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 13 organizations under Medicare reassignment (form CMS-855R): The Howard Young Medical Center, Inc. (NPI 1134183171, Woodruff, WI); Mchs Hospitals Inc (NPI 1942854716, Minocqua, WI); Aspirus Medical Group, Inc. (NPI 1679757751, Rhinelander, WI); Flambeau Hospital Inc (NPI 1194317966, Park Falls, WI); Aspirus Ironwood Hospital & Clinics, Inc. (NPI 1992704753, Ironwood, MI); and 8 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** February 11, 2026
- **Other identifiers:** Medicaid 43371600 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1003856618) · Data from the CMS NPPES public registry.