Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Pattie Chi Choy Mak, WH N.P.-BC

Women's Health Nurse Practitioner in San Gabriel, CA · enumerated 2006 · practices at Herald Christian Health Center.

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

National Provider Identifier

1821032889

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Registry record

Entity type Individual (Type 1)

Name Pattie Chi Choy Mak

Credential WH N.P.-BC

Sex Female

Practice address 923 S San Gabriel Blvd, San Gabriel, CA, 91776

Phone (626) 286-8700

Fax (626) 286-8650

Enumeration date Jun 16, 2006

Last updated in NPPES Sep 10, 2015

Taxonomy & licenses

363LW0102X Women's Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 7134 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
463716	Other	CA	BOARD REGISTERED NURSING

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 1821032889 active?

Yes, as of the latest NPPES snapshot, NPI 1821032889 is active (record last updated 2015-09-10).

How do I verify Pattie Mak's NPI record?

Cross-check NPI 1821032889 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-10.