1. Home
  2. Directory
  3. Wisconsin
  4. Mequon
  5. Surgery
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

THERESA SIEGERT M.D.
NPI 1295706695
Surgery - Surgery of the Hand in Mequon, WI

Active since February 01, 2006
12300 N PORT WASHINGTON RD, MEQUON, WI 53092(262) 243-5400(262) 243-6005 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Theresa Siegert M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THERESA SIEGERT M.D. (NPI 1295706695) is an individual surgery of the hand provider in Mequon, Wisconsin, licensed in Wisconsin (25432) and active in the NPI registry since February 2006.

NPPES Registry Identity

NPI1295706695
Entity TypeIndividualFemale
Primary Taxonomy2086S0105X
Provider Legal NameTHERESA SIEGERTCredential: M.D.
Location Address12300 N PORT WASHINGTON RDMequon, WI 53092-3339
Mailing Address12300 N Port Washington RdMequon, WI 53092-3339 · (262) 243-5400 · Fax (262) 243-6005
Phone(262) 243-5400
Fax(262) 243-6005
Sole ProprietorNo
Enumeration DateFebruary 1, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1295706695 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Surgery of the HandAllopathic & Osteopathic Physicians
Taxonomy Code2086S0105X
License✔ Licensed in WI · 25432
Definition
A surgeon with expertise in the investigation, preservation and restoration by medical, surgical and rehabilitative means, of all structures of the upper extremity directly affecting the form and function of the hand and wrist.
12300 N PORT WASHINGTON RD, Mequon, WI 53092
Open in Google Maps ↗

Other Identifiers 1

Medicaid31544100WI

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOHN SIEGERT M.D.
Orthopaedic Surgery (Hand Surgery)
12300 N PORT WASHINGTON RD
MEQUON, WI 53092
Ozaukee County (262) 243-5400
HAND DOCTORS OF MILWAUKEE, S.C.
Clinic/Center (Medical Specialty)
12300 N PORT WASHINGTON RD
MEQUON, WI 53092
Ozaukee County (262) 243-5400

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Theresa Siegert's NPI number?

The NPI number for Theresa Siegert is 1295706695. It was assigned to this individual provider in the NPPES registry on February 1, 2006.

Where is Theresa Siegert located?

Theresa Siegert practices at 12300 N Port Washington Rd, Mequon, WI 53092. The listed phone number is (262) 243-5400.

What is Theresa Siegert's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgery of the Hand, with taxonomy code 2086S0105X.

When was this NPI record last updated?

The NPPES record for Theresa Siegert was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.