Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Greg Breznican
Behavior Analyst in San Juan, PR · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639619612
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Registry record
Entity type Individual (Type 1)
Name Greg Breznican
Sex Male
Practice address 1473 Ave Wilson Ste 304, San Juan, PR, 00907
Phone (787) 489-0088
Enumeration date Feb 24, 2017
Last updated in NPPES Aug 21, 2026
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
What is the NPI number for Greg Breznican?
The National Provider Identifier (NPI) for Greg Breznican is 1639619612, a Type 1 (individual) record in the CMS NPPES registry.
Where does Greg Breznican practice?
The practice location on file with NPPES is in San Juan, PR. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Yaniz Padilla Dalmau Psychologist · San Juan, PR NPI 1285064659 Maria Haliga Torres Assistant Behavior Analyst · San Juan, PR NPI 1720871700 Wilmer Rivera Torres Psychologist · San Juan, PR NPI 1346133139 Daniela Rosario Behavior Technician · San Juan, PR NPI 1184519472 Mary Amoros Diaz Behavior Technician · San Juan, PR NPI 1487511465 Gianna Blasini Flores Behavior Technician · San Juan, PR NPI 1033024849 Priscilla Carlo Berrios Behavior Analyst · San Juan, PR NPI 1366912305 Lymarie Carnot Assistant Behavior Analyst · San Juan, PR NPI 1255038543
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-21.