Ascension Columbia St. Mary's Hospital Ozaukee

  • Emergency Care
  • Hospital/Medical Center
  • Imaging
  • Laboratory
  • Specialty Care
  • Mammography

13111 North Port Washington Rd
Mequon,  WI  53097

About Us
In Mequon, Wisconsin, Ascension Columbia St. Mary’s Hospital Ozaukee and ER delivers personalized testing and care for your everyday health needs.

Ascension Columbia St. Mary’s Hospital Ozaukee in Mequon, Wisconsin delivers specialty and 24/7 emergency care  and walk-in appointments at our Urgent Care clinic. We provide advanced surgical care for serious and life-threatening injuries and illnesses. Our care teams listen to understand your health needs and deliver care that's right for you. Ascension Columbia St. Mary’s Ozaukee is a destination for specialty care - including heart and vascular health, cancer care, wound care, orthopedics and surgery. Our OB-GYN maternity care teams at our Birthing Center deliver a personalized birthing experience and advanced neonatal care for sick babies. We offer a wide range of minimally invasive procedures using robotic-assisted technology, imaging and lab tests, a dedicated inpatient rehabilitation center, all on one campus.

Care for your everyday health needs

Our primary and specialty care doctors offer advanced care close to home. Learn more about our services and programs:

If you are experiencing a life-threatening medical emergency, go to the nearest ER or call 911

Learn more about Ascension Wisconsin Sites of Care.

Stroke Care

If you or a loved one are experiencing symptoms of a stroke, every second counts. It's important to get to the right place, at the right time. The Ascension Columbia St. Mary's Hospital Ozaukee Primary Stroke Center is Mequon’s advanced stroke center, and connected to specialists at our Comprehensive Stroke Center. Our care teams are here 24/7 - delivering advanced stroke care for even the most complex cases around the clock.


Ascension Columbia St. Mary's - Ozaukee, Healthgrade recognitions 2021

  • One of Healthgrades® America's 100 Best Hospitals for Critical Care™ for 2 Years in a Row (2020-2021)
  • Named Among the Top 10% in the Nation for Cardiology Services by Healthgrades® in 2021
  • Healthgrades® Five-Star Recipient for Treatment of Heart Attack for 4 Years in a Row (2018-2021)
  • Healthgrades® Five-Star Recipient for Treatment of Heart Failure for 5 Years in a Row (2017-2021)