Of all services, diagnostic endoscopy had the highest number waiting over the target time for every month of 2018-19, and the only service that had an increase over the year.
Hyd at bandemig COVID-19, mae gwybodaeth gyd-destunol yn dangos bod canolrif yr amseroedd aros ar gyfer profion diagnostig yn weddol sefydlog ers 2017 ac ar gyfer gwasanaethau therapi ers 2018.