Maria Luisa Castillo, PA-C
NPI 1184924144ActiveIndividual· Physician Assistant, Medical· Corona, CA
Physician Assistant, Medical (PA-C) with Healthcare Partners Affiliates Medical Group, practicing in Corona, California. Their prescriptions cost Medicare Part D more than their services did: $367,279 for 3,479 claims, against $6,368 paid for services in 2024. Corcept Therapeutics was the largest of 7 companies reporting payments in 2025, $274.22 in all, mostly food and beverage.
Overview
| NPI | 1184924144 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 25, 2010 |
| Last updated in NPPES | Nov 15, 2025 |
| Certified by provider | Nov 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | PA 21256 | 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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 67 |
|---|---|
| Services billed | 180 across 19 procedure codes |
| Paid by Medicare | $6,368 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,479 · 7,620 30-day fills |
|---|---|
| Patients | 471 |
| Total drug cost | $367,279 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Healthcare Partners Affiliates Medical GroupAnaheim, CA · 754 clinicians
Industry payments (Open Payments)
- 2025$274.22 · 11 payments from 7 companies
- 2024$140.12 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Corcept Therapeutics | $104.48 | 4 |
| Novo Nordisk Inc | $43.93 | 2 |
| Redhill Biopharma Inc. | $34.78 | 1 |
| Lilly USA, LLC | $31.72 | 1 |
| Amgen Inc. | $23.57 | 1 |
What the 2025 payments were for
- Food and Beverage$274.22 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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