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Lakeside Ob/Gyn, S.C.

Obstetrics & Gynecology Physician in Milwaukee, WI · enumerated 2006 · authorized official Kathleen Trebian, President/Owner.

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

National Provider Identifier

1891707873

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Registry record

Entity type Organization (Type 2)
Legal business name Lakeside Ob/Gyn, S.C.
Practice address 2524 E Webster Pl, Suite 303, Milwaukee, WI, 53211
Phone (414) 271-1116
Enumeration date Aug 11, 2006
Last updated in NPPES Nov 27, 2007

Taxonomy & classification

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 33771-020 (WI) Primary

Authorized official

Name Kathleen Trebian
Title President/Owner
Phone (414) 271-1116

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

Who is the authorized official for Lakeside Ob/Gyn, S.C.?
NPPES lists Kathleen Trebian (President/Owner) as the authorized official for this organization.
What is the NPI number for Lakeside Ob/Gyn, S.C.?
The NPI for Lakeside Ob/Gyn, S.C. is 1891707873, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-27.