Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Cardiac Surgery

Joshua L. Hermsen, MD

Works at hospitals in Madison, WI · Wisconsin

Summary

Dr. Joshua L. Hermsen, MD is a cardiac surgeon at 600 Highland Ave, Madison, WI 53792. Phone: (608) 263-6400. Accepts Medicare assignment. NPI 1063460566. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: Cardiac surgeon (Medicare lists Cardiac Surgery)
  • Address: 600 Highland Ave, Madison, WI 53792 · Directions
  • Phone: (608) 263‑6400
  • Medicare: Accepts Medicare assignment
  • Hospital: University of WI Hospitals & Clinics Authority
  • Group practice: University of Wisconsin Medical Foundation Inc
  • Medical school: University Of South Carolina School Of Medicine · graduated 2004 (22 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Joshua L. Hermsen, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Joshua L. Hermsen accept Medicare assignment?
Yes. Medicare's clinician data says Joshua L. Hermsen 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.
What is Joshua L. Hermsen's NPI number?
1063460566. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Joshua L. Hermsen works

Medicare's Facility Affiliation Data lists Joshua L. Hermsen 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.

Practice locations

Addresses where Joshua L. Hermsen is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Joshua L. Hermsen as a member of this group (CMS data updated October 2, 2026).

  • University of Wisconsin Medical Foundation Inc2,553 clinicians in the group

Specialties

Find other Cardiac Surgery doctors in Wisconsin →

Other cardiac surgeons in Madison

Clinicians with the same Medicare primary specialty in Madison, WI — not a recommendation.

All cardiac surgeons in Madison →

Other clinicians in University of Wisconsin Medical Foundation Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of South Carolina School Of Medicine
Graduation year2004 (22 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1063460566
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians