Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Henry William Nielsen
Peer Specialist in Nashua, NH · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1669076451
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Registry record
Entity type Individual (Type 1)
Name Henry William Nielsen
Sex Male
Practice address 440 Amherst St, Nashua, NH, 03063
Phone (603) 889-6147
Enumeration date Nov 23, 2020
Last updated in NPPES Nov 23, 2020
Taxonomy & licenses
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
Is NPI 1669076451 active?
Yes, as of the latest NPPES snapshot, NPI 1669076451 is active (record last updated 2020-11-23).
How do I verify Henry Nielsen's NPI record?
Cross-check NPI 1669076451 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-23.