Two independent medical practices in Minnesota once hoped to expand operations but have spent the past year struggling to recover from the cyberattack on a vast UnitedHealth Group payment system. Odom Health & Wellness, a sports medicine and rehabilitation outfit, and the Dillman Clinic & Lab, a family medicine practice, are among the thousands of medical offices that experienced sudden financial turmoil last year. The cyberattack against Change Healthcare, a division of United, paralyzed much of the nation's healthcare payment system for months.