NICHOLAS H. VONBERGEN M.D.
NPI 1124229406
Internal Medicine - Clinical Cardiac Electrophysiology in Madison, WI
About Nicholas H. Vonbergen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NICHOLAS H. VONBERGEN M.D. (NPI 1124229406) is an individual clinical cardiac electrophysiology provider in Madison, Wisconsin, licensed in Wisconsin (54041-20) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with University Of Wi Hospitals & Clinics Authority, and maintains a secondary practice location in La Crosse.
NPPES Registry Identity
Specialties & Licenses 3
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
Nicholas H. Vonbergen 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
10Medicare enrollment records show Nicholas Vonbergen reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Madison, WI 53715
- Reassigned Medicare billing, Wisconsin enrollment
- 1,377 clinicians in this Medicare group
Middleton, WI 53562
- Reassigned Medicare billing, Wisconsin enrollment
- 2,832 clinicians in this Medicare group
Wisconsin Dells, WI 53965
- Reassigned Medicare billing, Wisconsin enrollment
- 189 clinicians in this Medicare group
Elm Grove, WI 53122
- Reassigned Medicare billing, Wisconsin enrollment
- 1,457 clinicians in this Medicare group
West Allis, WI 53227
- Reassigned Medicare billing, Wisconsin enrollment
- 4,609 clinicians in this Medicare group
Milwaukee, WI 53209
- Reassigned Medicare billing, Wisconsin enrollment
- 1,615 clinicians in this Medicare group
Saint Francis, WI 53235
- Reassigned Medicare billing, Wisconsin enrollment
- 960 clinicians in this Medicare group
Sheboygan, WI 53081
- Reassigned Medicare billing, Wisconsin enrollment
- 673 clinicians in this Medicare group
Stevens Point, WI 54482
- Reassigned Medicare billing, Wisconsin enrollment
- 633 clinicians in this Medicare group
Green Bay, WI 54304
- Reassigned Medicare billing, Wisconsin enrollment
- 742 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Wi Hospitals & Clinics Authority
Acute Care Hospitals · Madison, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53792 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.
MADISON, WI 53792
MADISON, WI 53792
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 Nicholas Vonbergen's NPI number?
The NPI number for Nicholas Vonbergen is 1124229406. It was assigned to this individual provider in the NPPES registry on May 31, 2007.
Where is Nicholas Vonbergen located?
Nicholas Vonbergen practices at 600 Highland Ave, Madison, WI 53792. The listed phone number is (608) 263-6420.
What is Nicholas Vonbergen's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical Cardiac Electrophysiology, with taxonomy code 207RC0001X.
Is Nicholas Vonbergen enrolled in Medicare?
Yes. Nicholas Vonbergen 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 Nicholas Vonbergen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nicholas Vonbergen reassigns Medicare benefits to 10 organizations: Dean Health Systems, Inc (Madison, WI), University Of Wisconsin Medical Foundation, Inc (Middleton, WI), Mile Bluff Medical Center Inc (Wisconsin Dells, WI), Gundersen Lutheran Medical Center Inc (Elm Grove, WI), Aurora Medical Group, Inc. (West Allis, WI) and 5 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 Nicholas Vonbergen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nicholas Vonbergen accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare), Dean Health Plan and Group Health Cooperative-SCW and 5 other insurers list Nicholas Vonbergen 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 Nicholas Vonbergen affiliated with any hospitals?
According to CMS data, Nicholas Vonbergen is affiliated with University Of Wi Hospitals & Clinics Authority.
When was this NPI record last updated?
The NPPES record for Nicholas Vonbergen was last updated on June 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Nicholas H. Vonbergen, M.D. · NPI 1124229406
Clinical Cardiac Electrophysiology physician in Madison, Wisconsin. Individual provider, active in the CMS NPPES registry since May 31, 2007.
## Identity
- **NPI:** 1124229406 (Entity type: Individual)
- **Enumerated:** May 31, 2007
- **Primary specialty:** Internal Medicine - Clinical Cardiac Electrophysiology · taxonomy 207RC0001X
- **State license:** 54041-20 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 600 HIGHLAND AVE, Madison, WI 53792-0001
- **Phone:** (608) 263-6420 · **Fax:** (608) 265-8065
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Dean Health Systems, Inc (NPI 1053358846, Madison, WI); University Of Wisconsin Medical Foundation, Inc (NPI 1598784555, Middleton, WI); Mile Bluff Medical Center Inc (NPI 1487734380, Wisconsin Dells, WI); Gundersen Lutheran Medical Center Inc (NPI 1548992316, Elm Grove, WI); Aurora Medical Group, Inc. (NPI 1457592735, West Allis, WI); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Iowa, Rj & L Carver College Of Medicine, class of 2008
## Record status
- **NPPES last updated:** June 20, 2025
- **Other identifiers:** Medicaid 100009294 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1124229406) · Data from the CMS NPPES public registry.