John R. Walters, MD
NPI 1013907203ActiveIndividual· Internal Medicine· Oxnard, CA
Internal Medicine (MD) in Oxnard, California, trained at University of Southern California Keck School of Medicine (class of 1976). Their prescriptions cost Medicare Part D more than their services did: $624,667 for 5,058 claims, against $40,832 paid for services in 2024. Baxter Healthcare reported $22.31 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1013907203 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 27, 2005 |
| Last updated in NPPES | Sep 5, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A46739 | CA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | A46739 | CA |
| Internal Medicine, Pulmonary Disease | 207RP1001X | A46739 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 122 |
|---|---|
| Services billed | 489 across 21 procedure codes |
| Paid by Medicare | $40,832 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,058 · 10,911 30-day fills |
|---|---|
| Patients | 356 |
| Total drug cost | $624,667 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Pulmonary Disease |
Hospital affiliations
- Adventist Health Lodi MemorialLodi, CA
- St Johns Regional Medical CenterOxnard, CA
Industry payments (Open Payments)
- 2025$22.31 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Baxter Healthcare | $22.31 | 1 |
What the 2025 payments were for
- Food and Beverage$22.31 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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