How Do I Contact Medicare As A Provider? 
For specific billing questions , questions about claims , or your patience 's medical history , Medical providers can contact Medicare in a number of different ways : Online at www.MyMedicare.com ; By phone , calling 1-800-MEDICARE , or TTY1-877-486-2048 ; or by mail , sentto the following address : Centers for Medicare & Medicaid Services 7500 Security Boulevard Baltimore , Maryland 21244-1850 