Peggy L. Nguyen, MD

Medicare activity in 2024

Official CMS public-use data for Peggy L. 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. Critical care, first 30-74 minutes (99291)197 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)79 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)46 services
4. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)42 services
5. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)20 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%
• Stroke or mini-stroke75%
• Diabetes56%
• Arthritis55%
• Chronic kidney disease50%

Hospitals where Peggy L. Nguyen works

Medicare's Facility Affiliation Data lists Peggy L. 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.

• Keck Hospital of USCLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 050696
• USC Arcadia HospitalArcadia, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050238
• USC Verdugo Hills HospitalGlendale, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050124

Practice locations

Addresses where Peggy L. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

• 1500 San Pablo StLos Angeles, CA 90033
• 1516 San Pablo StLos Angeles, CA 90033 (800) 872‑2273
• 1516 San Pablo St, Suite L3100Los Angeles, CA 90033 (800) 872‑2273
• 1520 San Pablo StLos Angeles, CA 90033 (800) 872‑2273
• 1520 San Pablo St, Fl 4Los Angeles, CA 90033 (800) 872‑2273

Group practices

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

• USC Care Medical Group Inc1,380 clinicians in the group

Specialties

• Neurologyprimary

Find other Neurology doctors in California →

Other neurologists in Los Angeles

Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.

• Daniel R. Hawkins, MD
• Madeline D. Kahan, MD
• David Shaner, MD
• Dawn S. Eliashiv, MD
• Melita Petrossian, MD
• Bruce H. Dobkin, MD
• Anirudh Gupta, MD
• John M. Ringman, MD

All neurologists in Los Angeles →

Other clinicians in USC Care Medical Group Inc

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

• Yung Hsin Chang
• Freddi I. Segal-Gidan
• Jina Sohn, MD
• Eileen Liljeblad, MD
• Jacek Pinski, MD
• Caroline I. Piatek, 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