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Dr. Yon Yarn, D.O.

Internal Medicine Physician in Lancaster, CA · enumerated 2006.

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

National Provider Identifier

1023045309

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Registry record

Entity type Individual (Type 1)
Name Dr. Yon Yarn
Credential D.O.
Sex Male
Practice address 43839 15th St W, Lancaster, CA, 93534
Phone (661) 951-3009
Enumeration date Jun 26, 2006
Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License 20A9285 (CA) Secondary
208VP0014X Interventional Pain Medicine Physician Allopathic & Osteopathic Physicians · License 20A9285 (CA) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A9285 (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

Other identifiers

Identifier Type State Issuer
020A92851 Medicaid CA -
20A9285 Other CA MEDICAL LICENSE

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

Where does Yon Yarn practice?
The practice location on file with NPPES is in Lancaster, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Yon Yarn?
The National Provider Identifier (NPI) for Yon Yarn is 1023045309, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.