Nathan C. Hayes, DO

Medicare activity in 2024

Official CMS public-use data for Nathan C. Hayes, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Insertion of needle into vein for collection of blood sample (36415)312 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)137 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)120 services
4. Hemoglobin a1c level (83036)72 services
5. Blood test, lipids (cholesterol and triglycerides) (80061)69 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure52%
• High cholesterol52%
• Arthritis38%
• Diabetes20%
• Ischemic heart disease17%
• Anxiety15%

Hospitals where Nathan C. Hayes works

Medicare's Facility Affiliation Data lists Nathan C. Hayes 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.

• University of WI Hospitals & Clinics AuthorityMadison, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520098

Practice locations

Addresses where Nathan C. Hayes is enrolled with Medicare (CMS data updated October 2, 2026).

• 3051 Cahill MainFitchburg, WI 53711 (608) 661‑7200

Group practices

Medicare enrollment lists Nathan C. Hayes as a member of this group (CMS data updated October 2, 2026).

• Group Health Cooperative of South Central Wisconsin236 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Wisconsin →

Other family doctors in Fitchburg

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

• Michael J. Schiferl, MD
• Adriana C. Roman Soto, MD
• David S. Adams, MD
• Mary Anne A. Urtes, MD
• Kirsten L. Young, MD
• Carole E. Perry, MD
• Stephen J. Almasi, MD
• Robert W. Luchsinger, DO

All family doctors in Fitchburg →

Other clinicians in Group Health Cooperative of South Central Wisconsin

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

• Laina R. Macdonald
• John A. Jerisha, MD
• Laurence W. Trueman, MD
• Sarah E. Straka, MD
• Julie A. McLaughlin
• Morgan Quackenboss

Clinician information

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. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians