Tam Nguyen, DO

Medicare activity in 2024

Official CMS public-use data for Tam Nguyen, 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. Destruction of precancer skin growth, 2-14 growths (17003)229 services
2. Destruction of precancer skin growth, 1 growth (17000)54 services
3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)41 services
4. Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks (17312)40 services
5. Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks (17311)39 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 cholesterol72%
• High blood pressure60%
• Arthritis51%
• Diabetes22%
• Ischemic heart disease22%
• Anxiety19%

Hospitals where Tam Nguyen works

Medicare's Facility Affiliation Data lists Tam Nguyen 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.

• Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 520051

Practice locations

Addresses where Tam Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).

• 1550 Midway PlMenasha, WI 54952 (920) 738‑2000

Group practices

Medicare enrollment lists Tam Nguyen as a member of this group (CMS data updated October 2, 2026).

• Ascension Medical Group-Fox Valley Wisconsin, Inc259 clinicians in the group

Specialties

• Dermatologyprimary

Find other Dermatology doctors in Wisconsin →

Other dermatologists in Wisconsin

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

• Paul M. Segal, MD
• Jessica M. Ghaferi, MD
• Marguerite R. Compton, MD
• Tri V. Nguyen, MD
• Martin M. Okun, MD
• Elizabeth Miller, MD
• Elizabeth A. Nietert, MD
• Sun Young Ruggeri, MD

All dermatologists in Wisconsin →

Other clinicians in Ascension Medical Group-Fox Valley Wisconsin, Inc

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

• Vinod Kumar, MD
• Alesha L. Van Handel
• Robert L. Wilson, MD
• Aditya K. Rangbulla, MD
• Bryan A. Avery, MD
• Brianna M. Jankowski, PA

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