Thank You for Your Support Dr. Jonathan Olegario, his family and his staff would like to thank Mitchell and the surrounding communities for the amazing support they have provided our practice over the years. Schedule an appointment with us by calling 605-995-7000. Avera Medical Group Internal Medicine Avera Medical Group Internal Medicine 1900 Grassland Drive Mitchell, SD 57301 Jonathan Olegario, MD Thank You for Your Support Dr. Jonathan Olegario, his family and his staff would like to thank Mitchell and the surrounding communities for the amazing support they have provided our practice over the years. Schedule an appointment with us by calling 605-995-7000. Avera Medical Group Internal Medicine Avera Medical Group Internal Medicine 1900 Grassland Drive Mitchell, SD 57301 Jonathan Olegario, MD