Quick answers
- Does Li Q. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Li Q. Nguyen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Li Q. Nguyen see?
- In 2024, CMS data shows 356 Original Medicare patients and 22,195 services for Li Q. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Li Q. Nguyen's NPI number?
- 1902989064. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Li Q. 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.
| Original Medicare patients | 356 |
|---|---|
| Services billed to Medicare | 22,195 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)19,304 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)922 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)668 services
- Injection of medication into nasal air passage (30200)312 services
- Diagnostic exam of nasal passages using an endoscope (31231)254 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%
- Arthritis58%
- Diabetes42%
- Osteoporosis35%
- Ischemic heart disease30%
Hospitals where Li Q. Nguyen works
Medicare's Facility Affiliation Data lists Li Q. 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.
- UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
Practice locations
Addresses where Li Q. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 10760 Warner Ave, Suite 201Fountain Valley, CA 92708 (714) 593‑5356
Group practices
Medicare enrollment lists Li Q. Nguyen as a member of this group (CMS data updated October 2, 2026).
- Douglas a Tran MD Inc2 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in Fountain Valley
Clinicians with the same Medicare primary specialty in Fountain Valley, CA — not a recommendation.
Other clinicians in Douglas a Tran MD Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1902989064 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians