Gregory Robert Billings, MPAS
NPI 1598340044ActiveIndividual· Physician Assistant, Surgical· Tempe, AZ
Physician Assistant, Surgical (MPAS) in Tempe, Arizona, trained at Univeristy of Texas Rio Grande Valley Med School (class of 2020). Their prescriptions cost Medicare Part D more than their services did: $353,170 for 3,181 claims, against $32,284 paid for services in 2024. Vertex Pharmaceuticals Incorporated was the largest of 3 companies reporting payments in 2025, $62.92 in all, mostly food and beverage.
Overview
| NPI | 1598340044 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MPAS |
| Sole proprietor | No |
| NPI issued | Mar 16, 2021 |
| Last updated in NPPES | Jan 20, 2025 |
| Certified by provider | Jan 20, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Surgical Primary | 363AS0400X | 8367 | AZ |
| Physician Assistant, Medical | 363AM0700X | 8367 | AZ |
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 (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 244 |
|---|---|
| Services billed | 825 across 59 procedure codes |
| Paid by Medicare | $32,284 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,181 · 7,298 30-day fills |
|---|---|
| Patients | 471 |
| Total drug cost | $353,170 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Univeristy of Texas Rio Grande Valley Med School |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Physician Assistant |
Medical groups
- Honorhealth AmbulatoryScottsdale, AZ · 630 clinicians
- Summit Medical Group Arizona LLCGlendale, AZ · 158 clinicians
Hospital affiliations
- Honor Health John C. Lincoln Medical CenterPhoenix, AZ
- Honorhealth Scottsdale Osborn Medical CenterScottsdale, AZ
- Honorhealth Scottsdale Shea Medical CenterScottsdale, AZ
- Honorhealth Scottsdale Thompson Peak Med CtrScottsdale, AZ
Industry payments (Open Payments)
- 2025$62.92 · 3 payments from 3 companies
- 2024$128.96 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vertex Pharmaceuticals Incorporated | $24.67 | 1 |
| Abbott Laboratories | $20.21 | 1 |
| Amgen Inc. | $18.04 | 1 |
What the 2025 payments were for
- Food and Beverage$62.92 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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