Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michelle C Phan, O.D.

Optometrist in Rancho Cucamonga, CA · enumerated 2008 · practices at Kaiser Foundation Health Plan Inc.

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

National Provider Identifier

1639324619

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Registry record

Entity type Individual (Type 1)

Name Dr. Michelle C Phan

Credential O.D.

Sex Female

Practice address 10850 Arrow Rte, Rancho Cucamonga, CA, 91730

Phone (833) 574-2273

Enumeration date Nov 18, 2008

Last updated in NPPES Nov 30, 2021

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 13625T (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 1639324619 active?

Yes, as of the latest NPPES snapshot, NPI 1639324619 is active (record last updated 2021-11-30).

How do I verify Michelle Phan's NPI record?

Cross-check NPI 1639324619 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 2021-11-30.