In a statement from Rush University Medical Center, they said: "According to Mr. Johnson's transplant team, his kidney function is excellent. He is in good condition and making great progress."
Johnson received a kidney from his 25-year-old son Daniel, who was released on Thursday.
CPD Superintendent Eddie Johnson discharged from @RushMedical after successful kidney transplant & exceptional care from doctors & nurses. pic.twitter.com/EKJmpbfmzY
— Anthony Guglielmi (@AJGuglielmi) September 2, 2017
WATCH: Doctor explains kidney transplant surgery