
As of October 1, 2025, Madison Medical Affiliates is considered out-of-network with all UnitedHealthcare insurance plans. This change follows the expiration of the contract between Ascension WI & UHC.
We understand how concerning and frustrating this news may be. UHC covers many of our patients and their families, including our own staff. Please know that this development does not change our commitment to providing you with compassionate, high-quality care.
At this time, patients with UHC may experience higher out-of-pocket costs when receiving care at Madison Medical. We encourage you to:
While Ascension WI & UHC may continue discussions, we must move forward under this out-of-network status until further notice. We will keep you updated on any changes as soon as we learn more.
For more information, you can visit the official negotiation pages for each organization:
Thank you for your patience, understanding, and trust in Madison Medical Affiliates. We are grateful for the opportunity to care for you and your family.
Dr. John Sanidas earned his degree in medicine from the Medical College of Wisconsin in 1995 where he also completed his residency in Internal Medicine. Board Certified in Internal Medicine, he joined the staff of Madison Medical Affiliates in 1998. Dr. Sanidas is dedicated to delivering patient-centered care with a focus on preventive health and long-term wellness.
13133 N. Port Washington Road
Suite G18
Mequon, WI 53097
Appointments: (262)-243-5000
Get started on the road to healing by scheduling an appointment with our John Sanidas, M.D. Call for an appointment or complete our contact form.
Seton Professional Building (262) 243-5000