James W. Hornstein, M.D.
NPI 1629116587ActiveIndividual· Family Medicine· Ventura, CA
Family Medicine (M.D.) in Ventura, California, trained at University of California, Geffen School of Medicine (class of 1980). Their prescriptions cost Medicare Part D more than their services did: $317,286 for 4,344 claims, against $181,111 paid for services in 2024.
Overview
| NPI | 1629116587 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Feb 2, 2007 |
| Last updated in NPPES | Mar 23, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 770183168 | 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 - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 307 |
|---|---|
| Services billed | 2,620 across 43 procedure codes |
| Paid by Medicare | $181,111 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,344 · 10,486 30-day fills |
|---|---|
| Patients | 360 |
| Total drug cost | $317,286 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Family Practice |
Hospital affiliations
- Community Memorial Hospital - VenturaVentura, CA
- St Johns Regional Medical CenterOxnard, CA
Other facilities
- Assisted Home CareHome health agency · Ventura, CA
- Excellent In-Home Care, IncHome health agency · Woodland Hills, CA
- Mission Home Health of Ventura, LLCHome health agency · Oxnard, 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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All 261 family medicine physicians in Ventura · All family medicine physicians in California