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Siouxland Obstetrics & Gynecology, P.C.

Obstetrics & Gynecology Physician in Sioux City, IA · enumerated 2007 · authorized official Melissa Holtz, Authorized Official.

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

National Provider Identifier

1134250939

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Registry record

Entity type Organization (Type 2)
Legal business name Siouxland Obstetrics & Gynecology, P.C.
Practice address 2730 Pierce St Ste 201, Sioux City, IA, 51104
Phone (712) 277-3141
Enumeration date Mar 7, 2007
Last updated in NPPES Oct 18, 2022

Taxonomy & classification

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Melissa Holtz
Title Authorized Official
Phone (712) 277-3138

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 Siouxland Obstetrics & Gynecology, P.C.?
NPPES lists Melissa Holtz (Authorized Official) as the authorized official for this organization.
What is the NPI number for Siouxland Obstetrics & Gynecology, P.C.?
The NPI for Siouxland Obstetrics & Gynecology, P.C. is 1134250939, 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 2022-10-18.