Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Debbie Ann Ung, OD

Optometrist in Rancho Palos Verdes, CA · enumerated 2021.

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

National Provider Identifier

1770258931

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Registry record

Entity type Individual (Type 1)

Name Debbie Ann Ung

Credential OD

Sex Female

Practice address 28901 S Western Ave Ste 129, Rancho Palos Verdes, CA, 90275

Phone (310) 221-3676

Enumeration date Aug 10, 2021

Last updated in NPPES Aug 10, 2021

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 34904 (CA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1770258931 active?

Yes, as of the latest NPPES snapshot, NPI 1770258931 is active (record last updated 2021-08-10).

How do I verify Debbie Ung's NPI record?

Cross-check NPI 1770258931 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Andrew Marshall Optometrist · Rancho Palos Verdes, CA NPI 1598591216

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-10.