Hayley Ilene Risse, PA
NPI 1982352852ActiveIndividual· Physician Assistant· Fairfield, CA
Physician Assistant (PA) with Northbay Health Medical Foundation, practicing in Fairfield, California. Part D covered 2,253 prescriptions written in 2024, 64% of them generic. Ascendis Pharma Endocrinology Inc was the largest of 5 companies reporting payments in 2025, $125.24 in all, mostly food and beverage. Lists Northbay Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1982352852 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Mar 10, 2022 |
| Last updated in NPPES | Jul 24, 2026 |
| Certified by provider | Jul 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | — | — |
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) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 2,253 · 5,050 30-day fills |
|---|---|
| Patients | 487 |
| Total drug cost | $842,134 |
| Generic share | 64% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Northbay Health Medical FoundationFairfield, CA · 213 clinicians
Hospital affiliations
- Northbay Medical CenterFairfield, CA
- Sutter Medical Center, SacramentoSacramento, CA
Industry payments (Open Payments)
- 2025$125.24 · 5 payments from 5 companies
- 2024$1,268 · 60 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ascendis Pharma Endocrinology Inc | $28.31 | 1 |
| Amgen Inc. | $27.24 | 1 |
| Medtronic, Inc. | $24.52 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $23.95 | 1 |
| Lilly USA, LLC | $21.22 | 1 |
What the 2025 payments were for
- Food and Beverage$125.24 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 36 physician assistants in Fairfield · All physician assistants in California