Andrew Warren Hahn, M.D.
NPI 1770960767ActiveIndividual· Internal Medicine· Houston, TX
Internal Medicine (M.D.) in Houston, Texas, trained at University of Tennessee, Hsc, College of Medicine (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $997,466 for 210 claims, against $30,552 paid for services in 2024. Janssen Biotech, Inc. was the largest of 9 companies reporting payments in 2025, $21,875 in all, mostly consulting fees.
Overview
| NPI | 1770960767 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 29, 2015 |
| Last updated in NPPES | Jul 7, 2020 |
| Certified by provider | Jul 7, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | S4777 | 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 - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 147 |
|---|---|
| Services billed | 333 across 14 procedure codes |
| Paid by Medicare | $30,552 |
Part D prescriptions in 2024
| Prescriptions (claims) | 210 · 251 30-day fills |
|---|---|
| Patients | 58 |
| Total drug cost | $997,466 |
| Generic share | 72% of claims |
Education and affiliations
| Medical school | University of Tennessee, Hsc, College of Medicine |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Industry payments (Open Payments)
- 2025$21,875 · 37 payments from 9 companies
- 2024$16,015 · 29 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $10,371 | 7 |
| Tolmar, Inc. | $5,797 | 7 |
| Eisai Inc. | $2,514 | 3 |
| Exelixis Inc. | $1,797 | 13 |
| Pharmaand Gmbh | $730.42 | 2 |
What the 2025 payments were for
- Consulting Fee$12,446 · 5 payments
- Honoraria$6,125 · 2 payments
- Travel and Lodging$2,291 · 7 payments
- Food and Beverage$1,013 · 23 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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