COVID-19 Vaccine Update

Madison Medical Affiliates & Ascension are working together to vaccinate our patients & our community at several sites across SE Wisconsin. Please check our website for updates on eligibility & availability of the COVID-19 Vaccine.

  • Eligibility: Effective April 5th, the Wisconsin Department of Health Services (DHS) expanded vaccine eligibility to EVERYONE 16 and older. 
  • Availability: Madison Medical Affiliates has a small quantity of the Moderna COVID-19 vaccine. Click here to schedule your appointment online. 
  • *IMPORTANT*: The Moderna COVID-19 vaccine requires a 28 day booster shot. Do NOT schedule your 1st dose if you are unable to return for your 2nd dose. 

Click Here to Schedule Your COVID-19 Vaccine

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Rachel Oosterbaan, M.D.

Rachel Oosterbaan, M.D.

Dr. Rachel Oosterbaan attended medical school at Wayne State University in Detroit, and she completed her residency in Internal Medicine at Harvard Medical School during her postdoctoral training. In addition to serving as an attending physician at Northwestern Medicine® Lake Forest Hospital in Lake Forest, Illinois and at Northwestern Memorial Hospital in downtown Chicago over the past 16 years, Dr. Oosterbaan also worked as an assistant professor at Northwestern University’s Feinberg School of Medicine since 2000. Dr. Oosterbaan is board certified in Internal Medicine. Her most recent achievements include being voted by Castle Connolly as a “Top Doctor” in the Chicago metropolitan area, as well as voted by US News Report as a “Best Doctor.”

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Office Locations:

Seton Professional Building

13133 N Port Washington Rd, Suite G18 | Mequon, WI 53097
Appointments: (262) 243-5000