David Alan Diaz, M.D.
NPI 1033106380ActiveIndividual· Family Medicine· Round Rock, TX
Family Medicine (M.D.) in Round Rock, Texas, trained at University of Texas Southwestern Medical School at Dallas (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $113,491 for 2,304 claims, against $30,431 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 6 companies reporting payments in 2025, $172.37 in all, mostly food and beverage.
Overview
| NPI | 1033106380 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 3, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | J1080 | TX |
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 - Family Practice (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 166 |
|---|---|
| Services billed | 382 across 12 procedure codes |
| Paid by Medicare | $30,431 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,304 · 6,015 30-day fills |
|---|---|
| Patients | 255 |
| Total drug cost | $113,491 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of Texas Southwestern Medical School at Dallas |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Family Practice |
Medical group
- Great Oaks Family Practice PARound Rock, TX · 2 clinicians
Hospital affiliation
- Round Rock Medical CenterRound Rock, TX
Industry payments (Open Payments)
- 2025$172.37 · 8 payments from 6 companies
- 2024$241.15 · 13 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $60.24 | 2 |
| Exact Sciences Corporation | $38.21 | 2 |
| Amgen Inc. | $23.71 | 1 |
| Novo Nordisk Inc | $21.05 | 1 |
| Astrazeneca Pharmaceuticals LP | $14.72 | 1 |
What the 2025 payments were for
- Food and Beverage$172.37 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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