Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alan Mitchell Greenberg, OPTICAIN
Optician in Union, NJ · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1366461428
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Registry record
Entity type Individual (Type 1)
Name Alan Mitchell Greenberg
Credential OPTICAIN
Sex Male
Practice address 900 Stuyvesant Ave, Union, NJ, 07083
Phone (908) 687-3377
Enumeration date Jul 19, 2006
Last updated in NPPES Jul 9, 2007
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 specialty is Alan Greenberg?
Alan Greenberg is registered in NPPES with the primary taxonomy of Optician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all → Robin Innella Orthopaedic Surgery Physician · Union, NJ NPI 1578562245 John Faccone Orthopaedic Surgery Physician · Union, NJ NPI 1447259122 Yelena Maryams Optometrist · Union, NJ NPI 1740269034 Associated Orthopaedics P.A. Orthopaedic Surgery Physician · Union, NJ NPI 1295789857 Christine Swingle Surgical Physician Assistant · Union, NJ NPI 1336302850 A O Associated LLC Orthopaedic Surgery Physician · Union, NJ NPI 1730320151 Corey M. Notis, M.D., P.A. Ophthalmology Physician · Union, NJ NPI 1548509771
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.