Tien Trong Nguyen, MD
NPI 1356385025ActiveIndividual· Neurological Surgery· Fountain Valley, CA
Neurological Surgery (MD) in Fountain Valley, California, trained at New York Medical College (class of 1993). 497 Medicare patients in 2024, $233,377 paid; all of their 310 Part D prescriptions were generic. Precision Spine, Inc. was the largest of 8 companies reporting payments in 2025, $50,320 in all, mostly royalties and licenses.
Overview
| NPI | 1356385025 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 15, 2006 |
| Last updated in NPPES | Feb 28, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | G81962 | CA |
| Orthopaedic Surgery | 207X00000X | G81962 | 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 - Neurosurgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 497 |
|---|---|
| Services billed | 1,356 across 60 procedure codes |
| Paid by Medicare | $233,377 |
Part D prescriptions in 2024
| Prescriptions (claims) | 310 · 348 30-day fills |
|---|---|
| Patients | 131 |
| Total drug cost | $16,377 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Neurosurgery |
Medical group
- Tien T Nguyen M.D. Inc.Fountain Valley, CA · 6 clinicians
Hospital affiliations
- Memorialcare Orange Coast Medical CenterFountain Valley, CA
- Orange County Global Medical CenterSanta Ana, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$50,320 · 49 payments from 8 companies
- 2024$29,701 · 77 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Precision Spine, Inc. | $26,387 | 12 |
| Lilly USA, LLC | $17,382 | 24 |
| Pfizer Inc. | $4,907 | 3 |
| Biogennix, LLC | $1,022 | 4 |
| Biotissue Holdings Inc. | $278.13 | 2 |
What the 2025 payments were for
- Royalty or License$27,409 · 16 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$15,378 · 9 payments
- Consulting Fee$4,725 · 1 payment
- Travel and Lodging$1,475 · 7 payments
- Food and Beverage$1,333 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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