Joel Paul Ambrosio, PA-C
NPI 1154628105ActiveIndividual· Physician Assistant· Oakland, CA
Physician Assistant (PA-C) with Northbay Physicians Surgery Center, LLC and 1 other group, practicing in Oakland, California. Their prescriptions cost Medicare Part D more than their services did: $264,399 for 600 claims, against $55,186 paid for services in 2024. Lilly USA, LLC was the largest of 12 companies reporting payments in 2025, $1,254 in all, mostly food and beverage. Lists Northbay Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1154628105 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Feb 26, 2011 |
| Last updated in NPPES | Jul 7, 2020 |
| Certified by provider | Jul 7, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA21498 | CA |
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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 497 |
|---|---|
| Services billed | 765 across 12 procedure codes |
| Paid by Medicare | $55,186 |
Part D prescriptions in 2024
| Prescriptions (claims) | 600 · 828 30-day fills |
|---|---|
| Patients | 239 |
| Total drug cost | $264,399 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical groups
- Northbay Physicians Surgery Center, LLCFairfield, CA · 324 clinicians
- Northbay Health Medical FoundationFairfield, CA · 213 clinicians
Hospital affiliations
- Northbay Medical CenterFairfield, CA
- Providence Queen of the Valley Medical CenterNapa, CA
Industry payments (Open Payments)
- 2025$1,254 · 43 payments from 12 companies
- 2024$1,723 · 69 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $447.62 | 11 |
| Madrigal Pharmaceuticals | $196.00 | 6 |
| Abbvie Inc. | $187.28 | 8 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $119.95 | 5 |
| Qol Medical, LLC | $75.06 | 3 |
What the 2025 payments were for
- Food and Beverage$1,254 · 43 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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