Thang D. Nguyen, MD

Medicare activity in 2024

Official CMS public-use data for Thang D. 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. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)237 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)93 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)63 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)59 services
5. Removal of gallbladder using an endoscope (47562)48 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%
• Diabetes59%
• Chronic kidney disease53%
• Arthritis48%
• Ischemic heart disease46%

Hospitals where Thang D. Nguyen works

Medicare's Facility Affiliation Data lists Thang D. 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.

• AHMC Anaheim Regional Medical CenterAnaheim, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050226
• Foothill Regional Medical CenterTustin, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050780
• Memorialcare Orange Coast Medical CenterFountain Valley, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050678
• UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
• West Anaheim Medical CenterAnaheim, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050426

Practice locations

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

• 11180 Warner Ave, Suite 353Fountain Valley, CA 92708 (714) 434‑0404

Specialties

• General Surgeryprimary

Find other General Surgery doctors in California →

Other general surgeons in Fountain Valley

Clinicians with the same Medicare primary specialty in Fountain Valley, CA — not a recommendation.

• Timothy N. Le, MD
• Jane L. Kakkis, MD
• Richard A. Guerrero Jr., MD
• Kais Rona, MD
• Sean Cao, MD
• Sahil Gambhir, MD
• Mir B. Ali, MD
• Dena Amr, MD

All general surgeons in Fountain Valley →

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