Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Helen Mah

Pharmacist in Walnut Creek, CA · enumerated 2017.

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

National Provider Identifier

1679005334

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Registry record

Entity type Individual (Type 1)

Name Ms. Helen Mah

Sex Female

Practice address 2880 Shadelands Dr, Suite 201, Walnut Creek, CA, 94598

Phone (925) 979-6802

Enumeration date Mar 31, 2017

Last updated in NPPES Mar 31, 2017

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 47152 (CA) Primary

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 Helen Mah's NPI record?

Cross-check NPI 1679005334 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1679005334 active?

Yes, as of the latest NPPES snapshot, NPI 1679005334 is active (record last updated 2017-03-31).

Other providers at this practice address

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Francisco Chong Pharmacist · Walnut Creek, CA NPI 1427097278 Hien Weng Pharmacist · Walnut Creek, CA NPI 1285837989 Donna Hori Pharmacist · Walnut Creek, CA NPI 1053504100 Edlen Wong Pharmacist · Walnut Creek, CA NPI 1659670537 Stephanie Isorena Pharmacist · Walnut Creek, CA NPI 1720497530 Christina Do Pharmacist · Walnut Creek, CA NPI 1558893214 Valerie Bonifacio-Lee Pharmacist · Walnut Creek, CA NPI 1295267854 Kerry Umemoto-Leong Pharmacist · Walnut Creek, CA NPI 1770015430

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-03-31.