Kristen Castro, PA-C
NPI 1194311852ActiveIndividual· Physician Assistant, Medical· San Antonio, TX
Physician Assistant, Medical (PA-C) with Advanced Internal Medicine Practice PLLC, practicing in San Antonio, Texas. Their prescriptions cost Medicare Part D more than their services did: $526,826 for 4,265 claims, against $20,687 paid for services in 2024. Amgen Inc. was the largest of 6 companies reporting payments in 2025, $154.38 in all, mostly food and beverage.
Overview
| NPI | 1194311852 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | Yes |
| NPI issued | Dec 16, 2020 |
| Last updated in NPPES | Oct 3, 2025 |
| Certified by provider | Oct 3, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 18130 | TX |
| Physician Assistant, Medical | 363AM0700X | 58983 | CA |
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 - Physician Assistant (CA); Practitioner - Physician Assistant (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 75 |
|---|---|
| Services billed | 401 across 18 procedure codes |
| Paid by Medicare | $20,687 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,265 · 9,433 30-day fills |
|---|---|
| Patients | 514 |
| Total drug cost | $526,826 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 2020 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Advanced Internal Medicine Practice PLLCSan Antonio, TX · 3 clinicians
Industry payments (Open Payments)
- 2025$154.38 · 8 payments from 6 companies
- 2024$243.03 · 12 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $45.35 | 2 |
| Exact Sciences Corporation | $36.66 | 2 |
| Astrazeneca Pharmaceuticals LP | $22.87 | 1 |
| Lilly USA, LLC | $18.02 | 1 |
| Amneal Pharmaceuticals LLC | $17.23 | 1 |
What the 2025 payments were for
- Food and Beverage$154.38 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other physician assistants in San Antonio
- 1023209483
- 1033116736
- 1093475402
- 1093578759
- 1093715971
- 1093792616
- 1104208883
- 1104479104
- 1114167962
- 1134374424
- 1154619112
- 1194996314
All 211 physician assistants in San Antonio · All physician assistants in Texas