"The governor is here at the facility and the doctors are treating him," a doctor at the facility told the Star on Saturday.
ODM Party leader Raila Odinga and his daughter Ruth Odinga visited Nyong'o at the hospital. They told the media that the governor is in stable condition.
Nyongo was among the leaders that were attending the installation of the new Archbishop of Kisumu, Rev Philip Anyolo at the Uzima University grounds.
Earlier, Nyongo welcomed Raila at the installation ceremony for the new Kisumu Archbishop Philip Anyolo.