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

Mr. Brian Arthur Haesloop

Addiction (Substance Use Disorder) Counselor in West Sacramento, CA · enumerated 2009 · practices at C O R E Medical Clinic Inc.

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

National Provider Identifier

1336472117

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Registry record

Entity type Individual (Type 1)

Name Mr. Brian Arthur Haesloop

Sex Male

Practice address West Sacramento, CA, 95691

Phone (916) 796-0020

Fax (916) 796-0045

Enumeration date Sep 11, 2009

Last updated in NPPES Sep 17, 2021

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Secondary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License A06960315 (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

Where does Brian Haesloop practice?

The practice location on file with NPPES is in West Sacramento, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Brian Haesloop?

The National Provider Identifier (NPI) for Brian Haesloop is 1336472117, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-17.