Gregory R. Montoya, MD
NPI 1083614176ActiveIndividual· Psychiatry & Neurology, Psychiatry· Texarkana, TX
Psychiatry & Neurology, Psychiatry (MD) in Texarkana, Texas, trained at University of Texas Medical School at San Antonio (class of 1974). Their prescriptions cost Medicare Part D more than their services did: $291,182 for 1,212 claims, against $1,931 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 11 companies reporting payments in 2025, $3,227 in all, mostly food and beverage.
Overview
| NPI | 1083614176 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 29, 2005 |
| Last updated in NPPES | Jul 14, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | H5012 | TX |
| Psychiatry & Neurology, Psychiatry | 2084P0800X | E3176 | AR |
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 - Psychiatry (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 26 |
|---|---|
| Services billed | 55 across 7 procedure codes |
| Paid by Medicare | $1,931 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,212 · 1,350 30-day fills |
|---|---|
| Patients | 84 |
| Total drug cost | $291,182 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at San Antonio |
|---|---|
| Graduation year | 1974 |
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- Sabine Valley Regional Mhmr CenterLongview, TX · 18 clinicians
Hospital affiliation
- Christus St Michael Health SystemTexarkana, TX
Industry payments (Open Payments)
- 2025$3,227 · 197 payments from 11 companies
- 2024$1,898 · 133 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $713.13 | 39 |
| Vanda Pharmaceuticals Inc. | $625.35 | 28 |
| Neurocrine Biosciences, Inc. | $518.67 | 24 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $394.19 | 31 |
| E.R. Squibb & Sons, L.L.C. | $289.61 | 16 |
What the 2025 payments were for
- Food and Beverage$3,227 · 197 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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