Katherine L. Chang, PA-C
NPI 1912225384ActiveIndividual· Physician Assistant· Corpus Christi, TX
Physician Assistant (PA-C) with Allergy Partners of Texas Inc, practicing in Corpus Christi, Texas. Their prescriptions cost Medicare Part D more than their services did: $167,745 for 827 claims, against $1,759 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 15 companies reporting payments in 2025, $1,528 in all, mostly food and beverage.
Overview
| NPI | 1912225384 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | May 11, 2010 |
| Last updated in NPPES | Oct 31, 2023 |
| Certified by provider | Oct 31, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA06649 | 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 - Physician Assistant (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 37 |
|---|---|
| Services billed | 133 across 9 procedure codes |
| Paid by Medicare | $1,759 |
Part D prescriptions in 2024
| Prescriptions (claims) | 827 · 1,249 30-day fills |
|---|---|
| Patients | 171 |
| Total drug cost | $167,745 |
| Generic share | 68% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Allergy Partners of Texas IncAustin, TX · 22 clinicians
Industry payments (Open Payments)
- 2025$1,528 · 63 payments from 15 companies
- 2024$1,032 · 48 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $480.36 | 24 |
| Galderma Laboratories, L.P. | $225.85 | 11 |
| Regeneron Healthcare Solutions, Inc. | $177.29 | 5 |
| Genzyme Corporation | $122.48 | 1 |
| Glaxosmithkline, LLC. | $106.13 | 5 |
What the 2025 payments were for
- Food and Beverage$1,458 · 62 payments
- Education$69.81 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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