Phyllis Clara Chang, M.D.
NPI 1316058266ActiveIndividual· Internal Medicine, Gastroenterology· Bryan, TX
Internal Medicine, Gastroenterology (M.D.) in Bryan, Texas, trained at Texas A & M University System, Hsc, College of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $414,388 for 1,463 claims, against $147,985 paid for services in 2024. Madrigal Pharmaceuticals reported $122.54 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1316058266 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 31, 2006 |
| Last updated in NPPES | Aug 5, 2020 |
| Certified by provider | Aug 5, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | H9845 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 535 |
|---|---|
| Services billed | 3,827 across 39 procedure codes |
| Paid by Medicare | $147,985 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,463 · 2,568 30-day fills |
|---|---|
| Patients | 579 |
| Total drug cost | $414,388 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Texas A & M University System, Hsc, College of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Gastroenterology |
Medical group
- Central Texas Digestive Disease Association, PABryan, TX · 9 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$122.54 · 1 payment from 1 company
- 2024$765.15 · 29 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $122.54 | 1 |
What the 2025 payments were for
- Food and Beverage$122.54 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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