
We’re happy to share that Madison Medical Affiliates is once again in-network with all UnitedHealthcare insurance plans, effective October 1, 2025.
Ascension Wisconsin and UnitedHealthcare have finalized a new agreement that ensures continued access to in-network care for all UHC Commercial, Medicare, and Medicaid members. Any services received between October 1–13 will also be processed at in-network rates.
We are deeply grateful for your patience and understanding during this transition — and most of all, for the trust you place in us. It’s a privilege to care for you and your family, and we’re thrilled to welcome our UnitedHealthcare patients back with open arms.
As we work through this transition, please be patient with our team — we expect higher-than-usual call volumes over the next few days and will do our best to respond as quickly as possible.
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