Sergio O. Neira, M.D.
NPI 1043373194ActiveIndividual· Internal Medicine· Oxnard, CA
Internal Medicine (M.D.) with Primary Medical Group of Ventura County Inc and 1 other group, practicing in Oxnard, California. Their prescriptions cost Medicare Part D more than their services did: $1,477,104 for 11,451 claims, against $96,907 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 17 companies reporting payments in 2025, $2,726 in all, mostly food and beverage. Lists St Johns Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1043373194 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 19, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A38228 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 231 |
|---|---|
| Services billed | 1,715 across 38 procedure codes |
| Paid by Medicare | $96,907 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,451 · 27,267 30-day fills |
|---|---|
| Patients | 751 |
| Total drug cost | $1,477,104 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1973 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Primary Medical Group of Ventura County IncVentura, CA · 41 clinicians
- Spanish Hills Medical Group IncOxnard, CA · 3 clinicians
Hospital affiliation
- St Johns Regional Medical CenterOxnard, CA
Other facilities
- Livingston Memorial Visiting Nurse AssociationHome health agency · Ventura, CA
- Angel of God Hospice and Palliative Care IncHospice · Camarillo, CA
Industry payments (Open Payments)
- 2025$2,726 · 152 payments from 17 companies
- 2024$2,395 · 125 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $639.38 | 53 |
| Novo Nordisk Inc | $516.57 | 24 |
| Astellas Pharma US Inc | $265.97 | 14 |
| Amgen Inc. | $250.94 | 14 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $210.86 | 11 |
What the 2025 payments were for
- Food and Beverage$2,726 · 152 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 50 internal medicine physicians in Oxnard · All internal medicine physicians in California