Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ambulatory Surgical Center, LLC

Ambulatory Surgical Clinic/Center in Oshkosh, WI · enumerated 2006 · authorized official Eric Larson, Medical Director.

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

National Provider Identifier

1891717823

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Ambulatory Surgical Center, LLC

Practice address 2120 S Washburn St, Oshkosh, WI, 54904

Phone (920) 236-3550

Fax (920) 238-3169

Enumeration date Jul 25, 2006

Last updated in NPPES Feb 9, 2026

Taxonomy & classification

261QA1903X Ambulatory Surgical Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Eric Larson

Title Medical Director

Phone (920) 236-3550

Other identifiers

Identifier	Type	State	Issuer
NPI 1619957230	Other	-	STEPHEN J MERFELD
41911700	Medicaid	WI	-
NPI 1437244621	Other	-	BRADLEY N LEMKE
NPI 1275513467	Other	-	ERIC M LARSON

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Ambulatory Surgical Center, LLC?

Ambulatory Surgical Center, LLC is registered in NPPES as a Ambulatory Surgical 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-09.