AVERA WELCOMES Avera Cancer Institute John R. Simmons, DO RADIATION ONCOLOGY If you're facing a cancer diagnosis, trust John R. Simmons, DO, for compassionate and expert care at Avera Cancer Institute in Pierre. He creates personalized care plans to fit your needs using local, state-of-the-art treatment options, including: Intensity modulated radiation therapy (IMRT) Volumetric modulated arc therapy (VMAT) Electron beam 3-D conformal radiation therapy 801 E. Sioux Ave. | Pierre, SD 57501 605-224-3370 | Avera.org/Doctors PHYS-247256 AVERA WELCOMES Avera Cancer Institute John R. Simmons , DO RADIATION ONCOLOGY If you're facing a cancer diagnosis , trust John R. Simmons , DO , for compassionate and expert care at Avera Cancer Institute in Pierre . He creates personalized care plans to fit your needs using local , state - of - the - art treatment options , including : Intensity modulated radiation therapy ( IMRT ) Volumetric modulated arc therapy ( VMAT ) Electron beam 3 - D conformal radiation therapy 801 E. Sioux Ave. | Pierre , SD 57501 605-224-3370 | Avera.org/Doctors PHYS - 247256