Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Christine Stack, MSW, LICSW
Social Worker in Nashua, NH · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104064062
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Registry record
Entity type Individual (Type 1)
Name Christine Stack
Credential MSW, LICSW
Sex Female
Practice address 440 Amherst St, Nashua, NH, 03063
Phone (603) 889-6147
Enumeration date Jan 30, 2009
Last updated in NPPES Aug 8, 2024
Taxonomy & licenses
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 1022090 (MA) Secondary
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.
Frequently asked questions
What specialty is Christine Stack?
Christine Stack 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.
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.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-08.