Dr. Jay Paul Klarnet, MD

Dr. Klarnet practices at St. John's Cancer Care - Oxnard in Santa Maria, California.

Dr. Klarnet's NPI, 1538258314, was assigned on October 12, 2006. Dr. Klarnet holds Arizona license Z185726.

Dr. Klarnet's primary practice is St. John's Cancer Care - Oxnard, at 117 W Bunny Ave, Santa Maria, CA 93458 in Santa Barbara County. The practice phone is (805) 739-3890.

Dr. Klarnet's primary practice is St. John's Cancer Care - Oxnard in Santa Maria, California. Dr. Klarnet is also affiliated with Alaska Native Medical Center. The medical group on file is Pacific Central Coast Health Centers Medical Group. Dmand AI also links Dr. Klarnet to 4 more hospitals, 4 medical groups and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klarnet practices, 6 sites in all. Vendor and product names are available with a free account.

Medical oncology is Dr. Klarnet's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dmand AI has Dr. Klarnet's licenses on file in 2 states: Arizona and Washington.

CMS data shows 1,148 Medicare services from Dr. Klarnet across 6 procedure codes in 2024, for 430 Medicare patients. Medicare paid $126,764 for them.

CMS counts 430 Medicare patients who saw Dr. Klarnet in 2024. The largest group is 75 to 84, with 185 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.76, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Klarnet's median patient age at 73, with 53% women.

In 2024, Dr. Klarnet wrote 934 Medicare Part D claims for 218 patients. 76% of them were for generic drugs. CMS names the drug for 709 of them, across 25 drugs with 11 or more claims each, at $1,666,067 in total drug cost. In 2023, CMS named 869 claims across 28 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Klarnet for performance year 2024, reported as part of a group. Dr. Klarnet accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Klarnet as offering telehealth.

CMS Open Payments shows 631 general payments to Dr. Klarnet from 61 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 88% of the total. Pfizer Inc. paid the most, $847.