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

Courtney Anne Mack, LMSW

Social Worker in Westminster, MD · enumerated 2019.

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

National Provider Identifier

1669936993

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Registry record

Entity type Individual (Type 1)

Name Courtney Anne Mack

Credential LMSW

Sex Female

Practice address Westminster, MD, 21157

Phone (443) 289-8149

Enumeration date Jan 31, 2019

Last updated in NPPES Jan 31, 2019

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

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 24082 (MD) 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 Courtney Mack practice?

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

What is the NPI number for Courtney Mack?

The National Provider Identifier (NPI) for Courtney Mack is 1669936993, 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 2019-01-31.