Jay Paul Klarnet, MD
NPI 1538258314ActiveIndividual· Internal Medicine, Medical Oncology· Oxnard, CA
Internal Medicine, Medical Oncology (MD) in Oxnard, California, trained at State University of New York at Buffalo School of Medicine (class of 1980). Their prescriptions cost Medicare Part D more than their services did: $2,609,951 for 934 claims, against $133,494 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 21 companies reporting payments in 2025, $1,075 in all, mostly food and beverage.
Overview
| NPI | 1538258314 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 12, 2006 |
| Last updated in NPPES | Sep 2, 2026 |
| Certified by provider | Sep 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | G88453 | CA |
| Internal Medicine, Medical Oncology | 207RX0202X | Z185726 | AZ |
| Internal Medicine, Medical Oncology | 207RX0202X | MD00021124 | WA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | MD00021124 | WA |
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 - Medical Oncology (AZ); Practitioner - Internal Medicine (CA); Practitioner - Hematology/Oncology (MT); Practitioner - Hematology/Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 430 |
|---|---|
| Services billed | 1,226 across 14 procedure codes |
| Paid by Medicare | $133,494 |
Part D prescriptions in 2024
| Prescriptions (claims) | 934 · 1,417 30-day fills |
|---|---|
| Patients | 218 |
| Total drug cost | $2,609,951 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | State University of New York at Buffalo School of Medicine |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- Alaska Native Tribal Health ConsortiumAnchorage, AK · 607 clinicians
- Pacific Central Coast Health CentersTempleton, CA · 253 clinicians
- Scl Health Medical Group-Butte LLCButte, MT · 100 clinicians
- Hrmc, LLCLake Havasu City, AZ · 34 clinicians
Hospital affiliations
- Alaska Native Medical CenterAnchorage, AK
- Havasu Regional Medical CenterLake Havasu City, AZ
- La Paz Regional HospitalParker, AZ
- St James HospitalButte, MT
- St Johns Regional Medical CenterOxnard, CA
Industry payments (Open Payments)
- 2025$1,075 · 50 payments from 21 companies
- 2024$1,264 · 59 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $329.53 | 16 |
| Glaxosmithkline, LLC. | $89.40 | 4 |
| Merck Sharp & Dohme LLC | $79.22 | 3 |
| Daiichi Sankyo Inc. | $75.26 | 3 |
| Incyte Corporation | $63.20 | 3 |
What the 2025 payments were for
- Food and Beverage$1,075 · 50 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records