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Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Stephen G. Diamantoni, MD and Associates Family Practice

Optometrist in Lancaster, PA · enumerated 2007 · authorized official Lisa Carrigan, Billing Manager.

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

National Provider Identifier

1083828628

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Registry record

Entity type Organization (Type 2)
Legal business name Stephen G. Diamantoni, MD and Associates Family Practice
Other name <Unavail>
Parent organization Stephen G. Diamantoni, MD and Associates Family Practice
Practice address 319 N Duke St, Lancaster, PA, 17602
Phone (717) 396-0680
Enumeration date May 10, 2007
Last updated in NPPES Jul 10, 2008

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License OEG001575 (PA) Primary

Authorized official

Name Lisa Carrigan
Title Billing Manager
Phone (717) 295-2323

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

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Stephen G. Diamantoni, MD and Associates Family Practice?
Stephen G. Diamantoni, MD and Associates Family Practice is registered in NPPES as a Optometrist (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-10.