Quick answers
- Does Thuy A. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Thuy A. 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 Thuy A. Nguyen see?
- In 2024, CMS data shows 73 Original Medicare patients and 361 services for Thuy A. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Thuy A. Nguyen's NPI number?
- 1386688471. 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 Thuy A. 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 | 73 |
|---|---|
| Services billed to Medicare | 361 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes (99310)224 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)22 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)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 cholesterol68%
- Diabetes48%
- Chronic kidney disease45%
- Arthritis44%
- Heart failure36%
Practice locations
Addresses where Thuy A. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).
- 3090 Bristol St, Suite 200Costa Mesa, CA 92626 (888) 789‑9585
- 473 E Carnegie Dr, Suite 200San Bernardino, CA 92408 (562) 803‑4500
Group practices
Medicare enrollment lists Thuy A. Nguyen as a member of these groups (CMS data updated October 2, 2026).
- GN Medical Associates, Inc39 clinicians in the group
- Careconnectmd Ca PC27 clinicians in the group
Specialties
Other family doctors in Costa Mesa
Clinicians with the same Medicare primary specialty in Costa Mesa, CA — not a recommendation.
Other clinicians in GN Medical Associates, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | At Still University Of Health Sciences, College Of Osteo Med, Kirksville |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386688471 |
| 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