Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Alexander Dematteis IV, ED.D.
Counselor in O Fallon, MO · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477393163
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Registry record
Entity type Individual (Type 1)
Name Dr. Alexander Dematteis IV
Credential ED.D.
Sex Male
Practice address 1654 Bryan Rd, O Fallon, MO, 63368
Phone (636) 344-0433
Enumeration date May 29, 2024
Last updated in NPPES May 29, 2024
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 1477393163 active?
Yes, as of the latest NPPES snapshot, NPI 1477393163 is active (record last updated 2024-05-29).
How do I verify Alexander Dematteis's NPI record?
Cross-check NPI 1477393163 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-29.