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Greenwich Ambulatory Surgery Center LLC

Ophthalmologic Surgery Clinic/Center in Greenwich, CT · enumerated 2008 · authorized official Kenneth Rosenquest, Administrator.

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

National Provider Identifier

1780835991

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Registry record

Entity type Organization (Type 2)
Legal business name Greenwich Ambulatory Surgery Center LLC
Practice address 55 Holly Hill Ln, Greenwich, CT, 06830
Phone (860) 833-2375
Enumeration date Oct 7, 2008
Last updated in NPPES Dec 30, 2008

Taxonomy & classification

261QS0132X Ophthalmologic Surgery Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Kenneth Rosenquest
Title Administrator
Phone (860) 833-2375

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 Greenwich Ambulatory Surgery Center LLC?
Greenwich Ambulatory Surgery Center LLC is registered in NPPES as a Ophthalmologic Surgery Clinic/Center (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 2008-12-30.