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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Steven Greenstein, MD

Single Specialty Group in Teaneck, NJ · enumerated 2011 · practices at The Cornea and Laser Eye Institute, P.A..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1255627501

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Registry record

Entity type Individual (Type 1)
Name Steven Greenstein
Credential MD
Sex Male
Practice address Teaneck, NJ, 07666
Phone (201) 883-0505
Fax (201) 692-9646
Enumeration date Jun 24, 2011
Last updated in NPPES Nov 2, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care · License 000000000000 (NY) Secondary
193400000X Single Specialty Group Group · License 25MA09903400 (NJ) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

Where does Steven Greenstein practice?
The practice location on file with NPPES is in Teaneck, NJ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Steven Greenstein?
The National Provider Identifier (NPI) for Steven Greenstein is 1255627501, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-02.