AARON M.K. BUTLER M.D.
NPI 1962450775
Orthopaedic Surgery in Tomah, WI
About Aaron M.k. Butler M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AARON M.K. BUTLER M.D. (NPI 1962450775) is an individual orthopaedic surgery provider in Tomah, Wisconsin, licensed in Wisconsin (45054) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Gundersen Lutheran Medical Center, and is a graduate of University Of Wisconsin School Of Medicine (1997).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Aaron M.k. Butler M.d. 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
6Medicare enrollment records show Aaron Butler reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Tomah, WI 54660
- Reassigned Medicare billing, Wisconsin enrollment
- 249 clinicians in this Medicare group
Tomah, WI 54660
- Reassigned Medicare billing, Wisconsin enrollment
- 928 clinicians in this Medicare group
Elroy, WI 53929
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: St Josephs Health Services Inc
- 282 clinicians in this Medicare group
Friendship, WI 53934
- Reassigned Medicare billing, Wisconsin enrollment
- 280 clinicians in this Medicare group
Onalaska, WI 54650
- Reassigned Medicare billing, Wisconsin enrollment
- 1,457 clinicians in this Medicare group
Blair, WI 54616
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1124063573 (Wisconsin)
- 293 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 10
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Gundersen Lutheran Medical Center
Acute Care Hospitals · La Crosse, WIGundersen Tri-County Hospital & Clinics
Critical Access Hospitals · Whitehall, WITomah Memorial Hospital
Critical Access Hospitals · Tomah, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54660 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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 Aaron Butler's NPI number?
The NPI number for Aaron Butler is 1962450775. It was assigned to this individual provider in the NPPES registry on May 4, 2006.
Where is Aaron Butler located?
Aaron Butler practices at 1330 N Superior Ave, Tomah, WI 54660. The listed phone number is (608) 372-4111.
What is Aaron Butler's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Aaron Butler enrolled in Medicare?
Yes. Aaron Butler 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 Aaron Butler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Butler reassigns Medicare benefits to 6 organizations: Tomah Memorial Hospital Inc (Tomah, WI), Gundersen Clinic, Ltd. (Tomah, WI), St. Joseph's Health Services, Inc. (Elroy, WI), Moundview Memorial Hospital & Clinics, Inc (Friendship, WI), Gundersen Lutheran Medical Center, Inc (Onalaska, WI) and 1 more organization, 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 Aaron Butler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Aaron Butler accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, HealthPartners and Quartz list Aaron Butler 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 Aaron Butler affiliated with any hospitals?
According to CMS data, Aaron Butler is affiliated with Gundersen Lutheran Medical Center, Gundersen Tri-County Hospital & Clinics and Tomah Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Aaron Butler was last updated on February 1, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.