Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Anna Cartella Siembor, MSW, LICSW

Clinical Social Worker in Easthampton, MA · enumerated 2018.

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

National Provider Identifier

1023587938

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Registry record

Entity type Individual (Type 1)

Name Anna Cartella Siembor

Credential MSW, LICSW

Sex Female

Practice address 179 Northampton St, Easthampton, MA, 01027

Phone (413) 529-1764

Enumeration date Nov 20, 2018

Last updated in NPPES Oct 21, 2021

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License SC60777235 (WA) Secondary

1041C0700X Clinical Social Worker 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Anna Siembor?

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

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-21.