Hazen H. Tuck Jr., MD

Medicare activity in 2024

Official CMS public-use data for Hazen H. Tuck Jr., 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)284 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)236 services
3. Test to examine how well the lungs exchange gases (94729)113 services
4. Test to determine lung volumes using sensors (94726)85 services
5. Test to measure expiratory airflow and volume changes before and after medication administration (94060)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 cholesterol75%
• High blood pressure73%
• COPD58%
• Arthritis46%
• Asthma35%
• Anxiety34%

Hospitals where Hazen H. Tuck Jr. works

Medicare's Facility Affiliation Data lists Hazen H. Tuck Jr. 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.

• Mercy Health System CorpJanesville, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520066
• Mercy Walworth Hospital & Medical CenterLake Geneva, WI · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 521357
• 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 Hazen H. Tuck Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• N2950 State Rd, Suite 67Lake Geneva, WI 53147 (262) 245‑0535

Group practices

Medicare enrollment lists Hazen H. Tuck Jr. as a member of this group (CMS data updated October 2, 2026).

• Mercy Health System Corporation753 clinicians in the group

Specialties

• Pulmonary Diseaseprimary
• Sleep Medicinealso

Find other Pulmonary Disease doctors in Wisconsin →

Other pulmonologists in Wisconsin

Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.

• Donita Croft, MD
• Abbas Ali, MD
• Chan Yeu Pu, MD
• Suraj Bopanna, MD
• Rose A. Franco, MD
• Srikanth Davuluri, MD
• Shaher M. Samrah, MD
• Sara E. Fleet, MD

All pulmonologists in Wisconsin →

Other clinicians in Mercy Health System Corporation

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

• Jennifer C. Kubacik, OT
• Kyle Stengel
• Anil Aggarwal, MD
• Tamara R. Kramer, MD
• Stephen C. Cotton, MD
• John C. Rockwell, OD

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