Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alex Santiago
Counselor in Westborough, MA · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861905333
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Registry record
Entity type Individual (Type 1)
Name Alex Santiago
Sex Male
Practice address 154 Oak St, Westborough, MA, 01581
Phone (800) 366-7732
Fax (508) 898-1570
Enumeration date Nov 7, 2017
Last updated in NPPES Nov 7, 2017
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
Where does Alex Santiago practice?
The practice location on file with NPPES is in Westborough, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Alex Santiago?
The National Provider Identifier (NPI) for Alex Santiago is 1861905333, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-11-07.