Dr. Cassandra Leigh Thomas, MD

Dr. Thomas practices at Ventura County Medical Center in Ventura, California, part of Ventura County Health Care Agency.

Dr. Thomas' NPI, 1376787416, was assigned on April 20, 2009. Dr. Thomas graduated from Icahn School Of Medicine At Mount Sinai in 2009. Dr. Thomas' New Jersey license number on file is 25MA10384800.

Dr. Thomas' primary practice is Ventura County Medical Center, at 300 Hillmont Avenue, Ventura, CA 93003 in Ventura County. The practice phone is (805) 652-6075.

Dr. Thomas' primary practice is Ventura County Medical Center in Ventura, California, part of Ventura County Health Care Agency. Dr. Thomas is also affiliated with Community Memorial Hospital - Ventura. The medical group on file is Ventura County Medical Center. Dmand AI also links Dr. Thomas to 1 more community health center, 1 therapy and rehab clinic and 1 medical group, each named with a free account. Dr. Thomas' employer is on file too: a hospital.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomas practices, 4 sites in all. Vendor and product names are available with a free account.

Medical oncology is Dr. Thomas' primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Thomas is board certified in hematology by the American Board of Internal Medicine. Dmand AI has Dr. Thomas' licenses on file in 4 states: New Jersey, California, Pennsylvania and Delaware.

Dmand AI lists breast cancer, chronic leukemia, deep vein thrombosis (DVT), lung cancer, lymphoma, multiple myeloma and prostate cancer among the conditions Dr. Thomas treats.

CMS data shows 411 Medicare services from Dr. Thomas across 3 procedure codes in 2024, all of them office visits, for 95 Medicare patients. Medicare paid $45,746 for them.

CMS counts 95 Medicare patients who saw Dr. Thomas in 2024. The largest group is 65 to 74, with 42 patients. 66% of them have high blood pressure, and 52% have high cholesterol. 77% are also on Medicaid. Their average risk score is 1.74, 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. Thomas' median patient age at 56, with 82% women.

In 2024, Dr. Thomas wrote 232 Medicare Part D claims for 39 patients. 63% of them were for generic drugs. CMS names the drug for 144 of them, across 7 drugs with 11 or more claims each, at $694,978 in total drug cost. In 2023, CMS named 87 claims across 2 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Thomas for performance year 2024, reported as part of a group. Dr. Thomas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Thomas as offering telehealth.

CMS Open Payments shows 19 general payments to Dr. Thomas from 8 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 47% of the total. Sanofi and Genzyme US Companies paid the most, $370.

Dr. Thomas graduated from Icahn School Of Medicine At Mount Sinai in 2009.

Dr. Thomas is in network with 16 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Cigna. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.