Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dennis Sangyun Oh

Q: What is the NPI number for Dennis Oh?

The National Provider Identifier (NPI) for Dennis Oh is 1639760093, a Type 1 (individual) record in the CMS NPPES registry.

Registered Record Administrator in San Diego, CA · enumerated 2021.

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

National Provider Identifier

1639760093

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Registry record

Entity type Individual (Type 1)

Name Dennis Sangyun Oh

Sex Male

Practice address 3539 College Ave, San Diego, CA, 92115

Phone (619) 818-3788

Enumeration date Jan 28, 2021

Last updated in NPPES Jan 28, 2021

Taxonomy & licenses

246YR1600X Registered Record Administrator Technologists, Technicians & Other Technical Service Providers Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Dennis Oh practice?

The practice location on file with NPPES is in San Diego, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Dennis Oh?

The National Provider Identifier (NPI) for Dennis Oh is 1639760093, 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 2021-01-28.