Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David R Freyer, DO

Medical Oncology Physician in Los Angeles, CA · enumerated 2006.

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

National Provider Identifier

1578533865

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Registry record

Entity type Individual (Type 1)

Name David R Freyer

Credential DO

Sex Male

Practice address 1441 Eastlake Ave, Los Angeles, CA, 90089

Phone (323) 865-3000

Enumeration date Jan 26, 2006

Last updated in NPPES Nov 27, 2023

Taxonomy & licenses

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 20A10181 (CA) Secondary

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 5101009446 (MI) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 20A10181 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

Is NPI 1578533865 active?

Yes, as of the latest NPPES snapshot, NPI 1578533865 is active (record last updated 2023-11-27).

How do I verify David Freyer's NPI record?

Cross-check NPI 1578533865 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-27.