Diep Bui, M.D.
NPI 1649400359ActiveIndividual· Psychiatry & Neurology, Epilepsy· San Antonio, TX
Psychiatry & Neurology, Epilepsy (M.D.) with University of Texas Health Science Center at San Antonio, practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $297,193 for 759 claims, against $18,765 paid for services in 2024. Teva Pharmaceuticals USA, Inc. was the largest of 8 companies reporting payments in 2025, $365.73 in all, mostly food and beverage. Lists University Health System and 1 other hospital as hospital affiliations.
Overview
| NPI | 1649400359 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 16, 2009 |
| Last updated in NPPES | Oct 15, 2025 |
| Certified by provider | Oct 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Epilepsy Primary | 2084E0001X | S6141 | TX |
| Psychiatry & Neurology, Neurology | 2084N0400X | S6141 | TX |
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 - Neurology (DC); Practitioner - Neurology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 121 |
|---|---|
| Services billed | 252 across 19 procedure codes |
| Paid by Medicare | $18,765 |
Part D prescriptions in 2024
| Prescriptions (claims) | 759 · 1,231 30-day fills |
|---|---|
| Patients | 158 |
| Total drug cost | $297,193 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Neurology |
Medical group
- University of Texas Health Science Center at San AntonioSan Antonio, TX · 1,297 clinicians
Hospital affiliations
- University Health SystemSan Antonio, TX
- Ut Health San Antonio Multispecialty & Research HoSan Antonio, TX
Industry payments (Open Payments)
- 2025$365.73 · 12 payments from 8 companies
- 2024$591.63 · 22 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Teva Pharmaceuticals USA, Inc. | $110.43 | 2 |
| Ucb, Inc. | $74.91 | 2 |
| Jazz Pharmaceuticals Inc. | $38.82 | 2 |
| Otter Pharmaceuticals, LLC | $37.31 | 1 |
| Livanova USA, Inc. | $32.63 | 1 |
What the 2025 payments were for
- Food and Beverage$274.48 · 11 payments
- Education$91.25 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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