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

Mr. Ernest Anthony Saint-Leger

Addiction (Substance Use Disorder) Counselor in Dorchester Center, MA · enumerated 2022.

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

National Provider Identifier

1740935915

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Registry record

Entity type Individual (Type 1)

Name Mr. Ernest Anthony Saint-Leger

Sex Male

Practice address Dorchester Center, MA, 02124

Phone (781) 441-9199

Enumeration date Feb 16, 2022

Last updated in NPPES Feb 16, 2022

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 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

Where does Ernest Saint-Leger practice?

The practice location on file with NPPES is in Dorchester Center, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Ernest Saint-Leger?

The National Provider Identifier (NPI) for Ernest Saint-Leger is 1740935915, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-02-16.