Ankeny Office | Carroll Office | Johnston Office | Waukee Office | Des Moines Office | Appointment Request | Post-Appointment Survey | Refer a Patient | Refer a Friend Johnston Orthodontic Office Mark J. Guevarra DMD, MS Iowa Orthodontic Solutions Address: 6105 NW 86th St. Johnston, IA 50131 Phone: (515) 253-0911 View larger map