Jeffrey Ching-Ray Chang, MD
NPI 1134625361ActiveIndividual· Obstetrics & Gynecology· San Antonio, TX
Obstetrics & Gynecology (MD) in San Antonio, Texas, trained at University of Texas Medical Branch at Galveston (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $12,751 for 92 claims, against $3,752 paid for services in 2024. Exeltis, USA Inc. was the largest of 8 companies reporting payments in 2025, $334.48 in all, mostly food and beverage.
Overview
| NPI | 1134625361 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 5, 2018 |
| Last updated in NPPES | Apr 14, 2026 |
| Certified by provider | Apr 14, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | T5280 | TX |
| Obstetrics & Gynecology, Obstetrics | 207VX0000X | T5280 | 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 - Obstetrics/Gynecology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 29 |
|---|---|
| Services billed | 104 across 15 procedure codes |
| Paid by Medicare | $3,752 |
Part D prescriptions in 2024
| Prescriptions (claims) | 92 · 138 30-day fills |
|---|---|
| Patients | 37 |
| Total drug cost | $12,751 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of Texas Medical Branch at Galveston |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Synergy Healthcare Associates, PLLCSpring Branch, TX · 23 clinicians
Industry payments (Open Payments)
- 2025$334.48 · 16 payments from 8 companies
- 2024$669.68 · 32 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exeltis, USA Inc. | $112.39 | 5 |
| Biogen, Inc. | $74.65 | 4 |
| Sumitomo Pharma America, Inc. | $37.58 | 2 |
| Vertex Pharmaceuticals Incorporated | $30.41 | 1 |
| Pfizer Inc. | $26.17 | 1 |
What the 2025 payments were for
- Food and Beverage$334.48 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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