Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Darin Chao, PHARMD

Pharmacist in Longview, WA · enumerated 2024.

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

National Provider Identifier

1821834136

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Registry record

Entity type Individual (Type 1)

Name Dr. Darin Chao

Credential PHARMD

Sex Male

Practice address 1615 Delaware St, Longview, WA, 98632

Phone (360) 636-4808

Enumeration date Jul 5, 2024

Last updated in NPPES Jul 5, 2024

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License IR61550155 (WA) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD 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 Darin Chao's NPI record?

Cross-check NPI 1821834136 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821834136 active?

Yes, as of the latest NPPES snapshot, NPI 1821834136 is active (record last updated 2024-07-05).

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Lan Pham Internal Medicine Physician · Longview, WA NPI 1548264252 Tsz-Ming Chow Neurology Physician · Longview, WA NPI 1689679714 Lisa Evans Family Medicine Physician · Longview, WA NPI 1891790580 Lawrence Neville Neurology Physician · Longview, WA NPI 1134124639 R. Hughey Internal Medicine Physician · Longview, WA NPI 1316943590 Linda Johnston Adult Health Nurse Practitioner · Longview, WA NPI 1376549337 Leena Carriere Anesthesiology Physician · Longview, WA NPI 1982600805 Michael Bartlett Family Medicine Physician · Longview, WA NPI 1356348502

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-05.