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

Alexandra Louis, M.S.

Mental Health Counselor in Everett, MA · enumerated 2007.

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

National Provider Identifier

1578789541

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Registry record

Entity type Individual (Type 1)

Name Alexandra Louis

Credential M.S.

Sex Female

Practice address Everett, MA, 02149

Phone (781) 244-1950

Enumeration date Apr 18, 2007

Last updated in NPPES Jan 5, 2014

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

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 6907 (MA) 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

Is NPI 1578789541 active?

Yes, as of the latest NPPES snapshot, NPI 1578789541 is active (record last updated 2014-01-05).

How do I verify Alexandra Louis's NPI record?

Cross-check NPI 1578789541 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-05.