The Daily Herald reports that prosecutors allege Shaun Horn failed to let the injured woman call for help.
Deputy Prosecutor Paul Stern says in court papers that the 51-year-old woman was on the floor for nine hours and that three days passed before Horn summoned help for her.
A judge set bail this week at $100,000.
Sheriff's deputies found the woman on Feb. 21 at the couple's rural home. The newspaper says that after a hospital stay, she has been transferred to a convalescent facility and is currently unable to walk.