Jay Paul Klarnet, MD
Hematology/Oncology · Internal Medicine · Medical Oncology (CMS) · Oxnard, CA
At a glance
1700 N Rose Ave Ste 470, Oxnard, CA 93030-7659
NPPES record updated Sep 2, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
1700 N Rose Ave Ste 470Oxnard, CA 93030-7659
Additional reported practice locations
500 Paseo Camarillo Ste 104Camarillo, CA 930105900
Phone: 8059887085
Fax: 8059887086 500 Paseo Camarillo Ste 106
Camarillo, CA 930105900
Phone: 8059887085
Fax: 8059887086
Education & affiliations
- Medical / professional school
- State University Of New York At Buffalo School Of Medicine
- Graduation year
- 1980
- CMS specialties
- Hematology/Oncology · Internal Medicine · Medical Oncology
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
- Alaska Native Tribal Health Consortium
- Hrmc, Llc
- Pacific Central Coast Health Centers
- Scl Health Medical Group-Butte Llc
Reported hospital affiliations
- Alaska Native Medical Center Anchorage, AK
- Havasu Regional Medical Center Lake Havasu City, AZ
- La Paz Regional Hospital Parker, AZ
- St James Hospital Butte, MT
- St Johns Regional Medical Center Oxnard, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $1,074.54 |
Reporting companies
| Company | Amount |
|---|---|
| ASTRAZENECA PHARMACEUTICALS LP | $329.53 |
| GLAXOSMITHKLINE, LLC. | $89.40 |
| MERCK SHARP & DOHME LLC | $79.22 |
| DAIICHI SANKYO INC. | $75.26 |
| INCYTE CORPORATION | $63.20 |
| SOBI, INC | $61.28 |
| BAYER HEALTHCARE PHARMACEUTICALS INC. | $56.67 |
| EMD SERONO, INC. | $36.21 |
| Other reporting companies | $283.77 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Hematology/Oncology · Internal Medicine · Medical Oncology (CMS)
- Taxonomy code
- 207RX0202X
- Enumeration date
- Oct 12, 2006
- Record updated
- Sep 2, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207RX0202X · Primary
License reported: G88453 CA
207RX0202X
License reported: Z185726 AZ
207RX0202X
License reported: MD00021124 WA
207RH0003X
License reported: MD00021124 WA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
1700 N Rose Ave Ste 470Oxnard, CA 93030-7659
- Phone
- (805) 988-7080
- Fax
- (805) 988-7081
Mailing address
1700 N ROSE AVE STE 470OXNARD, CA 930307659
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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