Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Macarthur Gastrock, MH COUNSELOR RN

Psychiatric/Mental Health Registered Nurse in Norwalk, CA · enumerated 2015.

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

National Provider Identifier

1447639406

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Registry record

Entity type Individual (Type 1)

Name Macarthur Gastrock

Credential MH COUNSELOR RN

Sex Male

Practice address 12440 Imperial Hwy Ste 116, Norwalk, CA, 90650

Phone (562) 565-6363

Enumeration date May 23, 2015

Last updated in NPPES Oct 6, 2015

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 810778 (CA) Secondary

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 810778 (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.

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Frequently asked questions

How do I verify Macarthur Gastrock's NPI record?

Cross-check NPI 1447639406 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1447639406 active?

Yes, as of the latest NPPES snapshot, NPI 1447639406 is active (record last updated 2015-10-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-06.