Shao-Jen Chang, M.D.
NPI 1184797847ActiveIndividual· Internal Medicine· Huntsville, TX
Internal Medicine (M.D.) in Huntsville, Texas, trained at University of Texas Medical School at Houston (class of 1995). Their prescriptions cost Medicare Part D more than their services did: $436,055 for 6,816 claims, against $129,475 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 14 companies reporting payments in 2025, $468.66 in all, mostly food and beverage.
Overview
| NPI | 1184797847 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 17, 2006 |
| Last updated in NPPES | Feb 9, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | K3891 | TX |
| Pediatrics | 208000000X | K3891 | 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 - Pediatric Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 381 |
|---|---|
| Services billed | 4,614 across 65 procedure codes |
| Paid by Medicare | $129,475 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,816 · 15,148 30-day fills |
|---|---|
| Patients | 705 |
| Total drug cost | $436,055 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at Houston |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Pediatric Medicine |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Huntsville Family Medicine, LLPHuntsville, TX · 5 clinicians
Hospital affiliations
- Aspire HospitalConroe, TX
- Huntsville Memorial HospitalHuntsville, TX
Other facilities
- Benchmark Home Health, LLCHome health agency · Montgomery, TX
- Home Care SelectHome health agency · Conroe, TX
- Stat Home Health Houston LLCHome health agency · Huntsville, TX
Industry payments (Open Payments)
- 2025$468.66 · 25 payments from 14 companies
- 2024$751.08 · 30 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $102.25 | 6 |
| Sanofi Pasteur Inc. | $47.53 | 2 |
| Astellas Pharma US Inc | $44.14 | 2 |
| Pfizer Inc. | $44.02 | 2 |
| Exact Sciences Corporation | $43.93 | 3 |
What the 2025 payments were for
- Food and Beverage$468.66 · 25 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 internal medicine physicians in Huntsville · All internal medicine physicians in Texas