Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Carol Louie, NP

Family Nurse Practitioner in Arcadia, CA · enumerated 2022.

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

National Provider Identifier

1821729310

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Registry record

Entity type Individual (Type 1)

Name Carol Louie

Credential NP

Sex Female

Practice address Arcadia, CA, 91007

Phone (626) 635-1688

Enumeration date Jun 23, 2022

Last updated in NPPES Sep 2, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 95285285 (CA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95041378 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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

How do I verify Carol Louie's NPI record?

Cross-check NPI 1821729310 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821729310 active?

Yes, as of the latest NPPES snapshot, NPI 1821729310 is active (record last updated 2026-09-02).

Other providers at this practice address

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Katie Lin Physician Assistant · Arcadia, CA NPI 1104596535

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-09-02.