Thuy Nguyen, M.D.
NPI 1891015871ActiveIndividual· Family Medicine· Santa Ana, CA
Family Medicine (M.D.) with Gn Medical Associates, Inc and 2 other groups, practicing in Santa Ana, California. Their prescriptions cost Medicare Part D more than their services did: $1,576,738 for 21,881 claims, against $143,676 paid for services in 2024. Mannkind Corporation was the largest of 4 companies reporting payments in 2025, $207.48 in all, mostly food and beverage.
Overview
| NPI | 1891015871 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 1, 2010 |
| Last updated in NPPES | Nov 4, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | A110589 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 288 |
|---|---|
| Services billed | 2,458 across 37 procedure codes |
| Paid by Medicare | $143,676 |
Part D prescriptions in 2024
| Prescriptions (claims) | 21,881 · 25,333 30-day fills |
|---|---|
| Patients | 758 |
| Total drug cost | $1,576,738 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Family Practice |
Medical groups
- Gn Medical Associates, IncCorona, CA · 39 clinicians
- Careconnectmd Ca PCCosta Mesa, CA · 27 clinicians
- Care Partners California Medical PCCosta Mesa, CA · 20 clinicians
Other facilities
- Carewell Home Health, IncHome health agency · Orange, CA
- Master Home Health, Inc.Home health agency · Garden Grove, CA
- Network Providers for Home Health, IncHome health agency · La Palma, CA
- Pure Shield Health Services, Inc.Home health agency · Woodland Hills, CA
- Sano Vita Home Health Care, Inc.Home health agency · North Hollywood, CA
- 24/7 Care at Home - HospiceHospice · Ontario, CA
- 24/7 Care at Home - HospiceHospice · Westminster, CA
- Beneficial Hospice and Palliative CareHospice · La Palma, CA
- Bristol Hospice- Greater Los AngelesHospice · Lakewood, CA
- Maxcare HospiceHospice · Westminster, CA
- Alta Gardens Care CenterNursing home · Garden Grove, CA
- Anaheim Healthcare Center, LLCNursing home · Anaheim, CA
- Citrus Post-AcuteNursing home · Santa Ana, CA
- Garden Park Care CenterNursing home · Garden Grove, CA
- Healthcare Center of Orange CountyNursing home · Buena Park, CA
Industry payments (Open Payments)
- 2025$207.48 · 8 payments from 4 companies
- 2024$152.47 · 9 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mannkind Corporation | $77.05 | 3 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $59.99 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $52.92 | 2 |
| Aimmune Therapeutics, Inc. | $17.52 | 1 |
What the 2025 payments were for
- Food and Beverage$164.98 · 7 payments
- Education$42.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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