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Cassandra Leigh Thomas, M.D.

Hematology & Oncology Physician in Ventura, CA · enumerated 2009.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1376787416

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Registry record

Entity type Individual (Type 1)
Name Cassandra Leigh Thomas
Credential M.D.
Sex Female
Practice address 300 Hillmont Ave Ste 501, Ventura, CA, 93003
Phone (805) 652-6218
Enumeration date Apr 20, 2009
Last updated in NPPES Nov 17, 2025

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License C184675 (CA) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD446164 (PA) Secondary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 25MA10384800 (NJ) Secondary
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
102756150 Medicaid PA -
0311057 Medicaid NJ -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What specialty is Cassandra Thomas?
Cassandra Thomas is registered in NPPES with the primary taxonomy of Hematology & Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-17.