Lillian Tran Nguyen, PA-C
NPI 1245717024ActiveIndividual· Physician Assistant· Orange, CA
Physician Assistant (PA-C) with Orthopaedic Specialty Institute Medical Group of Orange County, practicing in Orange, California. 328 Medicare patients in 2024, $97,498 paid; nearly all of their 541 Part D prescriptions were generic (97%). Ibsa Pharma Inc. was the largest of 2 companies reporting payments in 2025, $54.36 in all, mostly food and beverage.
Overview
| NPI | 1245717024 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Jul 24, 2018 |
| Last updated in NPPES | Aug 8, 2024 |
| Certified by provider | Aug 8, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | — | — |
| Physician Assistant, Medical | 363AM0700X | — | — |
| Physician Assistant, Surgical | 363AS0400X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Physician Assistant (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 328 |
|---|---|
| Services billed | 1,879 across 10 procedure codes |
| Paid by Medicare | $97,498 |
Part D prescriptions in 2024
| Prescriptions (claims) | 541 · 554 30-day fills |
|---|---|
| Patients | 202 |
| Total drug cost | $12,802 |
| Generic share | 97% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Orthopaedic Specialty Institute Medical Group of Orange CountyNewport Beach, CA · 64 clinicians
Industry payments (Open Payments)
- 2025$54.36 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ibsa Pharma Inc. | $30.57 | 2 |
| Merz Pharmaceuticals, LLC | $23.79 | 1 |
What the 2025 payments were for
- Food and Beverage$54.36 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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