WARREN R. DUNN MD
NPI 1063509180
Orthopaedic Surgery in Weston, WI
About Warren R. Dunn Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WARREN R. DUNN MD (NPI 1063509180) is an individual orthopaedic surgery provider in Weston, Wisconsin, licensed in Wisconsin (61118) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and maintains a secondary practice location in Houston.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Warren R. Dunn Md 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
7Medicare enrollment records show Warren Dunn reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Weston, WI 54476
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1952890873 (Wisconsin)
- 2,476 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Neillsville, WI 54456
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1346239373 (Wisconsin)
- 1,283 clinicians in this Medicare group
Park Falls, WI 54552
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1700963048 (Wisconsin)
- 1,351 clinicians in this Medicare group
Waupun, WI 53963
- Reassigned Medicare billing, Wisconsin enrollment
- 1,447 clinicians in this Medicare group
Chetek, WI 54728
- Reassigned Medicare billing, Wisconsin enrollment
- 1,616 clinicians in this Medicare group
Houston, TX 77070
- Reassigned Medicare billing, Texas enrollment
- 51 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 9
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
Acute Care Hospitals · Marshfield, WIMarshfield Medical Center - Weston
Acute Care Hospitals · Weston, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54476 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.
WESTON, WI 54476
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 Warren Dunn's NPI number?
The NPI number for Warren Dunn is 1063509180. It was assigned to this individual provider in the NPPES registry on October 9, 2006.
Where is Warren Dunn located?
Warren Dunn practices at 3400 Ministry Pkwy, Weston, WI 54476. The listed phone number is (715) 847-3542.
What is Warren Dunn's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Warren Dunn enrolled in Medicare?
Yes. Warren Dunn 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 Warren Dunn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Warren Dunn reassigns Medicare benefits to 7 organizations: Mchs Hospitals Inc (Weston, WI), Marshfield Clinic Inc (Marshfield, WI), Memorial Hospital, Inc (Neillsville, WI), Flambeau Hospital Inc (Park Falls, WI), Beaver Dam Community Hospitals Inc (Waupun, WI) and 2 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 Warren Dunn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Warren Dunn accept?
Health plans from Imperial Insurance Companies, Inc. list Warren Dunn 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 Warren Dunn affiliated with any hospitals?
According to CMS data, Warren Dunn is affiliated with Marshfield Medical Center and Marshfield Medical Center - Weston.
When was this NPI record last updated?
The NPPES record for Warren Dunn was last updated on January 23, 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.
# Warren R. Dunn, MD · NPI 1063509180
Orthopaedic Surgery physician in Weston, Wisconsin. Individual provider, active in the CMS NPPES registry since October 9, 2006.
## Identity
- **NPI:** 1063509180 (Entity type: Individual)
- **Enumerated:** October 9, 2006
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** 61118 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 3400 MINISTRY PKWY, Weston, WI 54476-5220
- **Phone:** (715) 847-3542
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Mchs Hospitals Inc (NPI 1992336655, Weston, WI); Marshfield Clinic Inc (NPI 1952347981, Marshfield, WI); Memorial Hospital, Inc (NPI 1679746747, Neillsville, WI); Flambeau Hospital Inc (NPI 1194317966, Park Falls, WI); Beaver Dam Community Hospitals Inc (NPI 1629374780, Waupun, WI); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Florida College Of Medicine, class of 1997
## Record status
- **NPPES last updated:** January 23, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1063509180) · Data from the CMS NPPES public registry.