Richard Martin Grandquist III, PA-C
NPI 1578962049ActiveIndividual· Physician Assistant, Medical· Colton, CA
Physician Assistant, Medical (PA-C) in Colton, California, licensed in CA, with an NPI issued in August 2014. 378 Medicare patients in 2024, $40,234 paid; nearly all of their 201 Part D prescriptions were generic (95%).
Overview
| NPI | 1578962049 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Aug 20, 2014 |
| Last updated in NPPES | Aug 20, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 51840 | 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 | 378 |
|---|---|
| Services billed | 450 across 28 procedure codes |
| Paid by Medicare | $40,234 |
Part D prescriptions in 2024
| Prescriptions (claims) | 201 · 207 30-day fills |
|---|---|
| Patients | 147 |
| Total drug cost | $4,418 |
| Generic share | 95% of claims |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 15 physician assistants in Colton · All physician assistants in California