Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Callyn Wu, PHARMD

Pharmacist in Antioch, CA · enumerated 2024.

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

National Provider Identifier

1861222515

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Callyn Wu

Credential PHARMD

Sex Female

Practice address 5601 Deer Valley Rd, Antioch, CA, 94531

Phone (925) 813-6589

Enumeration date Aug 7, 2024

Last updated in NPPES Apr 25, 2026

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 89752 (CA) 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Callyn Wu?

Callyn Wu is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Carol Candiotti Nurse Practitioner · Antioch, CA NPI 1346264967 Melissa Carucci Internal Medicine Physician · Antioch, CA NPI 1376621813 Neeraj Tiwari Internal Medicine Physician · Antioch, CA NPI 1629156112 Atul Agrawal Rheumatology Physician · Antioch, CA NPI 1528146016 Allen Nan Obstetrics & Gynecology Physician · Antioch, CA NPI 1750469326 Jalal Atmar Internal Medicine Physician · Antioch, CA NPI 1265510846 Ioannis Eleftheriadis Internal Medicine Physician · Antioch, CA NPI 1679651731 Than Than Internal Medicine Physician · Antioch, CA NPI 1194803270

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-25.