Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Alexander Michael Trezza, O.D.
Optometrist in Denville, NJ · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437722873
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Registry record
Entity type Individual (Type 1)
Name Dr. Alexander Michael Trezza
Credential O.D.
Sex Male
Practice address 5 E Main St Ste 7, Denville, NJ, 07834
Phone (973) 983-0400
Enumeration date Jul 22, 2021
Last updated in NPPES Sep 28, 2022
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
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 Alexander Trezza practice?
The practice location on file with NPPES is in Denville, NJ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Alexander Trezza?
The National Provider Identifier (NPI) for Alexander Trezza is 1437722873, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-09-28.