Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jelena M Kao, MD

Hematology & Oncology Physician in San Mateo, CA · enumerated 2007 · practices at California Cancer Care A Medical Group Inc.

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

National Provider Identifier

1932242062

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Registry record

Entity type Individual (Type 1)

Name Dr. Jelena M Kao

Credential MD

Sex Female

Practice address 218 De Anza Blvd, San Mateo, CA, 94402

Phone (650) 341-9131

Fax (650) 341-9135

Enumeration date Feb 15, 2007

Last updated in NPPES Apr 29, 2025

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD-24166 (HI) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License A83980 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Jelena Kao?

Jelena Kao 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 2025-04-29.