Kathleen L. Lak, MD

Assistant Professor


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


  • Bariatric Surgery
  • General Surgery

Bariatric Surgery Appointments and Referrals

General Surgery Appointments and Referrals

I believe in providing safe and effective health care to help you achieve the best overall quality of life. I ensure a comprehensive evaluation and a collaborative treatment team to guide you through the process and ensure a positive patient centered experience.


Diseases and Conditions

  • Gastroesophageal Reflux Disease (GERD)
  • Obesity
  • Hiatal Hernia
  • Hernia
  • Gallstones
  • Benign Gallbladder Disease
  • Umbilical Hernia
  • Incisional Hernia

Treatments and Services

  • Foregut Surgery
  • Hernia Surgery
  • Inguinal (groin) Hernia Repair
  • Laparoscopic Gastric Bypass Surgery
  • Laparoscopic Sleeve Gastrectomy
  • Bariatric Surgery
  • Cholecystectomy
  • Minimally Invasive General Surgery
  • Virtual Visit

Patients Ages Seen

  • Adult
  • Senior


  • English

Hospital Affiliations

  • Froedtert Hospital – Milwaukee

Board Certifications

  • Surgery

Clinic Locations


Dr. Kate Lak completed her Minimally Invasive and Bariatric Surgery Fellowship at Froedtert & the Medical College of Wisconsin in 2017. She specializes in minimally invasive foregut, hernia and general surgery in addition to bariatric surgery as part of the Comprehensive Weight Loss Center. She sees patients both at Froedtert Hospital and Drexel Town Square Health Center. Her research interests include clinical outcomes research in benign foregut, hernia and bariatrics.

Education and Training

Doctor of Medicine - Medical College of Wisconsin - Milwaukee, WI (2007-2011)
Residency in General Surgery - Medical College of Wisconsin Affiliated Hospitals - Milwaukee, WI (2011-2016)
Fellowship in Minimally Invasive and Bariatric Surgery - Medical College of Wisconsin - Milwaukee, WI (2016-2017)