Yen T. Nguyen, MD

Medicare activity in 2024

Official CMS public-use data for Yen T. 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)343 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)213 services
3. Hospital discharge day management, more than 30 minutes (99239)169 services
4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)50 services
5. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)28 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 pressure75%
• High cholesterol75%
• Arthritis51%
• Ischemic heart disease49%
• Atrial fibrillation46%
• Chronic kidney disease40%

Hospitals where Yen T. Nguyen works

Medicare's Facility Affiliation Data lists Yen T. 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.

• El Camino HealthMountain View, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050308
• Good Samaritan HospitalSan Jose, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050380

Practice locations

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

• 2425 Samaritan DrSan Jose, CA 95124 (408) 559‑2011
• 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
• 795 El Camino RealPalo Alto, CA 94301 (415) 600‑1020
• 815 Pollard RdLos Gatos, CA 95032 (408) 378‑6131

Group practices

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

• Sutter Bay Medical Foundation3,829 clinicians in the group

Specialties

• Hospitalistprimary

Find other Hospitalist doctors in California →

Other hospitalists in San Jose

Clinicians with the same Medicare primary specialty in San Jose, CA — not a recommendation.

• Sri S. Viswanathan, MD
• Dalena Thai, MD
• Bich-Ha L. Nguyen, MD
• James S. Guetzkow, MD
• Komal J. Bhatt, MD
• Matthew J. Awerbuck, MD
• Mandana Abollhassani, MD
• Alicia C. Daisley, MD

All hospitalists in San Jose →

Other clinicians in Sutter Bay Medical Foundation

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

• Matthew G. Houlahan, MD
• Timothy Davern, MD
• Thomas E. Quigg, DO
• Sumbella Baqai, MD
• Sara K. Cronin, NP
• Rashid Iqbal, 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