Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Hosei Yim, MD

Surgery Physician in Duarte, CA · enumerated 2006.

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

National Provider Identifier

1598731820

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Registry record

Entity type Individual (Type 1)

Name Dr. John Hosei Yim

Credential MD

Sex Male

Practice address 1500 E Duarte Rd, Duarte, CA, 91010

Phone (626) 471-7269

Enumeration date Feb 27, 2006

Last updated in NPPES Nov 25, 2020

Taxonomy & licenses

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians · License G88325 (CA) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G88325 (CA) Primary

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
001813295	Medicaid	PA	-

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

How do I verify John Yim's NPI record?

Cross-check NPI 1598731820 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1598731820 active?

Yes, as of the latest NPPES snapshot, NPI 1598731820 is active (record last updated 2020-11-25).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-25.