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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Andrew Paul Clack, MA

Marriage & Family Therapist in Rancho Cucamonga, CA · enumerated 2013 · practices at Stepanian Family Counseling Inc.

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

National Provider Identifier

1578903175

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Registry record

Entity type Individual (Type 1)
Name Mr. Andrew Paul Clack
Credential MA
Sex Male
Practice address Rancho Cucamonga, CA, 91701
Phone (951) 235-2372
Fax (909) 981-2210
Enumeration date Jun 27, 2013
Last updated in NPPES Sep 3, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 96297 (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

Is NPI 1578903175 active?
Yes, as of the latest NPPES snapshot, NPI 1578903175 is active (record last updated 2018-09-03).
How do I verify Andrew Clack's NPI record?
Cross-check NPI 1578903175 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 2018-09-03.