Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Arthur S Fergusson
Psychologist in Westford, MA · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1720311269
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Registry record
Entity type Individual (Type 1)
Name Arthur S Fergusson
Sex Male
Practice address 234 Littleton Rd, Westford, MA, 01886
Phone (978) 496-8150
Enumeration date Sep 16, 2009
Last updated in NPPES Feb 20, 2025
Taxonomy & licenses
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care 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
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 Arthur Fergusson?
Arthur Fergusson is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-20.