Want to talk to us in person? Need to drop off a payment? Have questions about Medicare? You can visit our service centers for all these things. We accept payments (personal, business or cashier’s checks, or money orders) at all service centers except for Blue Care Network in Ann Arbor. Medicare representatives are available from 9 a.m. to 4:30 p.m. weekdays (Monday, Wednesday, Friday only in Detroit). Just enter your ZIP below to get started. Have a question about a service center? Call the phone number on the back of your enrollee ID card and we'll help.