NPI Portal NPI Lookup & Verification

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

Ms. Barbara R Lewis, MSW

Clinical Social Worker in Concord, MA · enumerated 2013 · practices at Atrius Health, Inc..

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

National Provider Identifier

1891133351

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ms. Barbara R Lewis
Credential MSW
Sex Female
Practice address Concord, MA, 01742
Phone (978) 287-9380
Fax (978) 287-9314
Enumeration date Jun 6, 2013
Last updated in NPPES Jun 6, 2013

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 218388 (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

Where does Barbara Lewis practice?
The practice location on file with NPPES is in Concord, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Barbara Lewis?
The National Provider Identifier (NPI) for Barbara Lewis is 1891133351, 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 2013-06-06.