NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Mary E Barrett, MSW, LCSW, SAC-IT

Clinical Social Worker in Mequon, WI · enumerated 2011.

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

National Provider Identifier

1811272123

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ms. Mary E Barrett
Credential MSW, LCSW, SAC-IT
Sex Female
Practice address 10532 N Port Washington Rd, Mequon, WI, 53092
Phone (262) 242-3810
Fax (262) 242-3816
Enumeration date Oct 18, 2011
Last updated in NPPES Feb 24, 2012

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 1003-123 (WI) Primary
101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 16518130 (WI) Secondary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

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 Mary Barrett practice?
The practice location on file with NPPES is in Mequon, WI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Barrett?
The National Provider Identifier (NPI) for Mary Barrett is 1811272123, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-24.