Roger E. Castillo, PA-C
NPI 1134235773ActiveIndividual· Physician Assistant· Walnut Creek, CA
Physician Assistant (PA-C) in Walnut Creek, California, licensed in CA and MT, with an NPI issued in August 2006. Part D covered 417 prescriptions written in 2024, 88% of them generic. Exact Sciences Corporation reported $24.76 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1134235773 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Aug 23, 2006 |
| Last updated in NPPES | Jul 12, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA55863 | CA |
| Physician Assistant | 363A00000X | 152 | MT |
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 (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 417 · 828 30-day fills |
|---|---|
| Patients | 158 |
| Total drug cost | $23,255 |
| Generic share | 88% of claims |
Industry payments (Open Payments)
- 2025$24.76 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $24.76 | 1 |
What the 2025 payments were for
- Food and Beverage$24.76 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Physician Assistant providers in Walnut Creek
- 1639979552
- 1114416773
- 1841537115
- 1801575543
- 1790023620
- 1689075236
- 1639194616
- 1891084117
- 1891463667
- 1902936115
- 1487927414
- 1730559642