His admittance follows interim orders that were issued by the Waigani National Court on 23 February by Human Rights judge, Justice David Cannings.
The interim order allowed for urgent medical attention to be given for his “deteriorating medical conditions”.
Wartoto, who was sentenced on 23 June 2017, was in hospital from March 2017 to 10 January 2018 when he was taken back to Bomana without being formally discharged.
He was among those prisoners who were removed from the hospital on 10 January on orders from the Correctional Service Commissioner, Michael Waipo.