Zachary Michael Zwolak, D.O.
NPI 1265695571ActiveIndividual· Family Medicine, Addiction Medicine· Ventura, CA
Family Medicine, Addiction Medicine (D.O.) in Ventura, California, trained at Lake Erie College of Osteopathic Medicine, Erie (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $50,428 for 442 claims, against $19,572 paid for services in 2024. Indivior Inc. was the largest of 3 companies reporting payments in 2025, $292.45 in all, mostly food and beverage.
Overview
| NPI | 1265695571 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jul 7, 2008 |
| Last updated in NPPES | Aug 8, 2024 |
| Certified by provider | Aug 8, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine, Addiction Medicine Primary | 207QA0401X | 20A12298 | CA |
| Preventive Medicine, Addiction Medicine | 2083A0300X | 20A12298 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Addiction Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 118 |
|---|---|
| Services billed | 242 across 18 procedure codes |
| Paid by Medicare | $19,572 |
Part D prescriptions in 2024
| Prescriptions (claims) | 442 · 898 30-day fills |
|---|---|
| Patients | 50 |
| Total drug cost | $50,428 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Lake Erie College of Osteopathic Medicine, Erie |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Addiction Medicine |
| Secondary specialties | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- County of VenturaVentura, CA · 344 clinicians
Hospital affiliation
- Ventura County Medical CenterVentura, CA
Industry payments (Open Payments)
- 2025$292.45 · 15 payments from 3 companies
- 2024$200.83 · 9 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Indivior Inc. | $196.87 | 11 |
| Alkermes, Inc. | $77.54 | 3 |
| Gilead Sciences, Inc. | $18.04 | 1 |
What the 2025 payments were for
- Food and Beverage$292.45 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Family Medicine, Addiction Medicine providers in Ventura
- 1508315250
- 1619592623
- 1902427404
- 1528707593
- 1801059555
- 1457915795
- 1356835243
- 1013656883
- 1821619529
- 1285257378
- 1609561018
- 1063084440
All Family Medicine, Addiction Medicine providers in California →