Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Holly T Masui, PHARM. D.

Pharmacist in Baldwin Park, CA · enumerated 2006.

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

National Provider Identifier

1881773349

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Holly T Masui

Credential PHARM. D.

Sex Female

Practice address 1011 Baldwin Park Blvd, Baldwin Park, CA, 91706

Phone (626) 851-1011

Fax (626) 851-7289

Enumeration date Nov 3, 2006

Last updated in NPPES Feb 19, 2010

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License RPH 41074 (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 NPI 1881773349 active?

Yes, as of the latest NPPES snapshot, NPI 1881773349 is active (record last updated 2010-02-19).

How do I verify Holly Masui's NPI record?

Cross-check NPI 1881773349 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

Browse all →

Heng Long Chhay Family Medicine Physician · Baldwin Park, CA NPI 1225021041 Armond Khachatourians Orthopaedic Surgery Physician · Baldwin Park, CA NPI 1689656340 Steven Park Internal Medicine Physician · Baldwin Park, CA NPI 1104897495 Vicki Quan Internal Medicine Physician · Baldwin Park, CA NPI 1962477299 Michelle Britt Ophthalmology Physician · Baldwin Park, CA NPI 1043286040 Andrea Backes Emergency Medicine Physician · Baldwin Park, CA NPI 1831158104 Ying-Ting Yeh Family Medicine Physician · Baldwin Park, CA NPI 1508825944 Jennifer Graham Orthopaedic Surgery Physician · Baldwin Park, CA NPI 1629025085

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-19.