U.S. Sen. Johnny Isakson was released from a hospital in Washington, D.C., on Saturday after falling and breaking four ribs earlier in the week. He will enter an inpatient rehabilitation program at WellStar Kennestone Hospital in Marietta.

A team of doctors at Kennestone will help the Georgia Republican improve his stamina and mobility through physical therapy as he copes with Parkinson’s disease, an illness he publicly disclosed in 2015.

“I’m on the mend and looking forward to fully healing my fractured ribs through intensive rehabilitation,” Isakson, 74, said in a prepared statement. “I thank everyone who has lifted me up through prayer and well-wishes.”

MORE: Johnny Isakson hospitalized after fall

The three-term senator was hospitalized after taking a tumble in his new D.C. apartment late Tuesday. He leads the Senate Ethics and Veterans’ Affairs committees.