Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allison Elizabeth Harren, LICSW

Social Worker in Arlington, MA · enumerated 2007.

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

National Provider Identifier

1235348707

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Allison Elizabeth Harren

Credential LICSW

Sex Female

Practice address 339 Massachusetts Ave, Arlington, MA, 02474

Phone (833) 510-4357

Fax (866) 460-2997

Enumeration date May 22, 2007

Last updated in NPPES Nov 1, 2022

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 115183 (MA) Secondary

104100000X Social Worker Behavioral Health & Social Service Providers · License 115183 (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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Allison Harren?

Allison Harren is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-01.