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On Site Health Services PC

Optometrist in Blue Bell, PA · enumerated 2005 · authorized official Gary Itzenson, Owner Director Active, Attending.

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

National Provider Identifier

1720083553

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Registry record

Entity type Organization (Type 2)
Legal business name On Site Health Services PC
Practice address 482 Norristown Rd, Suite 111, Blue Bell, PA, 19422
Phone (610) 825-8210
Fax (610) 825-8208
Enumeration date Jun 17, 2005
Last updated in NPPES Feb 6, 2026

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 27OA00437400 (NJ) Secondary
152W00000X Optometrist Eye and Vision Services Providers · License OE006115T (PA) Primary

Authorized official

Name Gary Itzenson
Title Owner Director Active, Attending
Phone (610) 825-8210

Other identifiers

Identifier Type State Issuer
100775693000 Medicaid PA -
2205211 Medicaid NJ -

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 type of organization is On Site Health Services PC?
On Site Health Services PC is registered in NPPES as a Optometrist (its primary provider taxonomy).
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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-06.