At the end of June 2019, Cwm Taf Morgannwg advised the Welsh Government that they thought there was an issue with the reporting of certain RTT waiting lists.
Rhoddodd Cwm Taf Morgannwg wybod i Lywodraeth Cymru ddiwedd mis Mehefin 2019 eu bod yn credu fod problem ag adrodd ar rai rhestrau aros rhwng atgyfeirio a derbyn triniaeth.