Andrew Sean Kastenmeier, MD

Associate Professor


  • General Surgery - Froedtert Hospital
  • 900 N. 92nd St.
  • Milwaukee, WI 53226


  • General Surgery

General Surgery Appointments and Referrals

Key aspects of my patient care philosophy are: A comprehensive evaluation, a careful review of all medical and surgical options, a thoughtful plan of care, precise surgical technique, compassionate post-operative care and a commitment to open communication. I strive to offer the most current surgical technology with the safest and most effective outcomes possible. I strive to offer the most current surgical technology with the most safe and effective outcomes possible.


Diseases and Conditions

  • Achalasia
  • Gastroesophageal Reflux Disease (GERD)
  • Gastroparesis
  • Para-Esophageal Hernia
  • Hernia
  • Gallbladder Disease

Treatments and Services

  • Advanced Diagnostic Endoscopy
  • Advanced Laparoscopic Surgery
  • Advanced Therapeutic Endoscopy
  • Complex Abdominal Hernia Repair
  • Inguinal (groin) Hernia Repair
  • Laparoscopic Hiatal Hernia Repair
  • Laparoscopic Inguinal/Open
  • Laparoscopic Nissen Fundoplication
  • Laparoscopic Paraesophageal Hernia Repair
  • Laparoscopic Splenectomy
  • Laparoscopic Ventral Hernia/Open
  • Umbilical Hernia Repair
  • LINX ® Reflux Management System for GERD
  • Heller Myotomy
  • Cholecystectomy
  • Abdominal Wall Reconstruction
  • Esophageal Myotomy
  • Per-Oral Endoscopic Myotomy (POEM)

Patients Ages Seen

  • Adolescent
  • Adult
  • Senior


  • English

Hospital Affiliations

  • Froedtert Hospital – Milwaukee

Board Certifications

  • Surgery

Clinic Locations



Andrew S. Kastenmeier, MD, completed his surgical residency at the University of Utah in Salt Lake City. He then pursued specialty fellowship training in advanced endoscopic and laparoscopic gastrointestinal surgery at Legacy Health in Portland, OR. He is a member of the Division of General Surgery. Dr. Kastenmeier grew up in Cedarburg, Wisconsin.


His clinical interests include minimally invasive (laparoscopic) surgery of the gastrointestinal tract, minimally invasive surgery for reflux disease and hiatal hernias, advanced endoscopic surgery of the stomach and esophagus, bariatric (obesity) surgery, and hernia repair surgery.  His research focus is on clinical outcomes in foregut surgery, device development, new surgical technology, and advanced endoscopic surgery.  He is a minimally invasive surgeon who serves on national committees and has membership in key surgical professional societies.

Education and Training

Doctor of Medicine - University of Wisconsin Medical School - Madison, WI (2004)
Residency, General Surgery - University of Utah - Salt Lake City, UT (2004-2010)
Residency, Surgical Research - University of Utah - Salt Lake City, UT (2007-2008)
Fellowship, Minimally Invasive and Foregut Surgery - Legacy Health - Portland, OR (2010-2011)