Mazen Hashisho, M.D.
NPI 1255524427ActiveIndividual· Surgery, Vascular Surgery· Aptos, CA
Surgery, Vascular Surgery (M.D.) with Monterey Bay Vascular Inc, practicing in Aptos, California. 427 Medicare patients in 2024, $1,468,659 paid; nearly all of their 134 Part D prescriptions were generic (91%). Angiodynamics, Inc. was the largest of 13 companies reporting payments in 2025, $31,502 in all, mostly device and supply loans. Lists Dominican Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1255524427 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 21, 2007 |
| Last updated in NPPES | Sep 29, 2026 |
| Certified by provider | Sep 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Vascular Surgery Primary | 2086S0129X | A94329 | CA |
| Surgery, Vascular Surgery | 2086S0129X | MD441265 | PA |
| Surgery, Vascular Surgery | 2086S0129X | 002845 | NY |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | A94329 | 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 - Vascular Surgery (CA); Practitioner - Thoracic Surgery (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 427 |
|---|---|
| Services billed | 3,545 across 113 procedure codes |
| Paid by Medicare | $1,468,659 |
Part D prescriptions in 2024
| Prescriptions (claims) | 134 · 229 30-day fills |
|---|---|
| Patients | 74 |
| Total drug cost | $12,024 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Vascular Surgery |
| Secondary specialties | General Surgery, Thoracic Surgery |
| Telehealth | Offers telehealth |
Medical group
- Monterey Bay Vascular IncSalinas, CA · 3 clinicians
Hospital affiliations
- Dominican HospitalSanta Cruz, CA
- Natividad Medical CenterSalinas, CA
Industry payments (Open Payments)
- 2025$31,502 · 33 payments from 13 companies
- 2024$31,499 · 36 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Angiodynamics, Inc. | $30,000 | 1 |
| Bard Peripheral Vascular, Inc. | $470.04 | 6 |
| Boston Scientific Corporation | $252.37 | 5 |
| Becton, Dickinson and Company | $182.09 | 3 |
| Reflow Medical Inc | $181.80 | 8 |
What the 2025 payments were for
- Long term medical supply or device loan$30,000 · 1 payment
- Food and Beverage$1,502 · 32 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Surgery, Vascular Surgery providers in Aptos
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