Alexander M. Villareal, MD

Medicare activity in 2024

Official CMS public-use data for Alexander M. Villareal, 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. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)422 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)290 services
3. Sleep study including heart rate, breathing, and sleep time (95800)128 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)86 services
5. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)76 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 pressure71%
• High cholesterol71%
• Arthritis41%
• Diabetes31%
• Chronic kidney disease31%
• Depression29%

Hospitals where Alexander M. Villareal works

Medicare's Facility Affiliation Data lists Alexander M. Villareal 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.

• Gundersen Boscobel Area Hospital and ClinicsBoscobel, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521344
• Gundersen Lutheran Medical CenterLa Crosse, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520087
• Reedsburg Area Medical CenterReedsburg, WI · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 521351
• St Elizabeth Medical CenterWabasha, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241335
• Vernon Memorial HospitalViroqua, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521348

Practice locations

Addresses where Alexander M. Villareal is enrolled with Medicare (CMS data updated October 2, 2026).

• 1400 Eastside RdPlatteville, WI 53818
• 1836 S AveLa Crosse, WI 54601 (608) 783‑7300
• 407 S Main StViroqua, WI 54665 (608) 637‑3195

Group practices

Medicare enrollment lists Alexander M. Villareal as a member of these groups (CMS data updated October 2, 2026).

• Gundersen Lutheran Medical Center Inc895 clinicians in the group
• Gundersen Clinic Ltd418 clinicians in the group
• Southwest Health Center Inc114 clinicians in the group
• Saint Elizabeths Hospital of Wabasha Inc94 clinicians in the group

Specialties

• Sleep Medicineprimary
• Internal Medicinealso

Find other Sleep Medicine doctors in Wisconsin →

Other sleep medicine doctors in Wisconsin

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

• Steven R. Barczi, MD
• Daniel S. Petersen, MD
• James P. Gapinski, MD
• Amit Gupta, MD
• Courtland N. Kouassiaman, MD
• Jose F. Pareja Zabala, MD
• Mihai C. Teodorescu, MD
• Ewa I. Alexander, MD

All sleep medicine doctors in Wisconsin →

Other clinicians in Gundersen Lutheran Medical Center Inc

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

• Evan K. Sandok, MD
• Kara K. Petrashek, MD
• Maude L. Kettenmann, MD
• Christopher J. Whalen, MD
• Dragos V. Balf, MD
• Aditya Sukhwal, MD

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