Quick answers
- Does Tien Q. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Tien 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 Tien Q. Nguyen see?
- In 2024, CMS data shows 1,593 Original Medicare patients and 14,943 services for Tien Q. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Tien Q. Nguyen's NPI number?
- 1396741351. 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 Tien 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 | 1,593 |
|---|---|
| Services billed to Medicare | 14,943 |
| Different services or procedures | 83 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)2,569 services
- Destruction of precancer skin growth, 2-14 growths (17003)1,735 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)1,393 services
- Destruction of skin growth, 1-14 growths (17110)981 services
- Destruction of skin growth, 15 or more growths (17111)624 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%
- Arthritis48%
- Diabetes41%
- Chronic kidney disease31%
- Ischemic heart disease27%
Practice locations
Addresses where Tien Q. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 17271 Brookhurst StFountain Valley, CA 92708 (714) 531‑2966
- 17305 Von Karman Ave, Suite 107Irvine, CA 92614 (949) 679‑9997
- 3037 W Horizon Ridge Pkwy, Suite 120Henderson, NV 89052 (702) 749‑3303
- 4013 Reyes AveLas Vegas, NV 89141
Group practices
Medicare enrollment lists Tien Q. Nguyen as a member of these groups (CMS data updated October 2, 2026).
- First Oc Dermatology PC13 clinicians in the group
- Tien Q Nguyen MD Dermatology Prof Corp2 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Fountain Valley
Clinicians with the same Medicare primary specialty in Fountain Valley, CA — not a recommendation.
Other clinicians in First Oc Dermatology PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Florida College Of Medicine |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396741351 |
| 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
- 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