Mark A. Vierra, MD
NPI 1295706448ActiveIndividual· Surgery· Monterey, CA
Surgery (MD) in Monterey, California, trained at Harvard Medical School (class of 1985). 400 Medicare patients in 2024, $215,746 paid; nearly all of their 351 Part D prescriptions were generic (90%).
Overview
| NPI | 1295706448 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 27, 2006 |
| Last updated in NPPES | Jan 11, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | G59649 | 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 - General Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 400 |
|---|---|
| Services billed | 984 across 108 procedure codes |
| Paid by Medicare | $215,746 |
Part D prescriptions in 2024
| Prescriptions (claims) | 351 · 496 30-day fills |
|---|---|
| Patients | 133 |
| Total drug cost | $35,285 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | General Surgery |
| Telehealth | Offers telehealth |
Medical group
- Montage Medical GroupMonterey, CA · 127 clinicians
Hospital affiliations
- Community Hospital of the Monterey PeninsulaMonterey, CA
- Salinas Valley Health Medical CenterSalinas, CA
Other facilities
- Inhome Healthcare ServicesHome health agency · Monterey, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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