John J. Byun, MD
NPI 1932763620ActiveIndividual· Psychiatry & Neurology, Psychiatry· McKinney, TX
Psychiatry & Neurology, Psychiatry (MD) in McKinney, Texas, trained at Boston University School of Medicine (class of 2019). Part D covered 121 prescriptions written in 2024, 94% of them generic. Teva Pharmaceuticals USA, Inc. was the largest of 6 companies reporting payments in 2025, $340.14 in all, mostly food and beverage.
Overview
| NPI | 1932763620 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 28, 2019 |
| Last updated in NPPES | Mar 10, 2026 |
| Certified by provider | Mar 10, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | T4716 | 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 - Psychiatry (TX) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 121 · 141 30-day fills |
|---|---|
| Patients | 29 |
| Total drug cost | $21,030 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Psychiatry |
Medical group
- Collin County Mental Health Mental Retardation CenterMcKinney, TX · 24 clinicians
Industry payments (Open Payments)
- 2025$340.14 · 14 payments from 6 companies
- 2024$81.79 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Teva Pharmaceuticals USA, Inc. | $113.32 | 4 |
| E.R. Squibb & Sons, L.L.C. | $98.14 | 4 |
| Otsuka America Pharmaceutical, Inc. | $62.05 | 3 |
| Neurocrine Biosciences, Inc. | $31.80 | 1 |
| Tris Pharma Inc | $19.47 | 1 |
What the 2025 payments were for
- Food and Beverage$340.14 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 46 psychiatrists in McKinney · All psychiatrists in Texas