Until all health boards are able to report data consistently using the more detailed codes, specialties have been recoded as their previous description to avoid inconsistent reporting.
Hyd nes y bydd pob bwrdd iechyd yn gallu adrodd data yn gyson gan ddefnyddio’r codau mwy manwl, mae arbenigeddau wedi’u hailgodio fel eu disgrifiad blaenorol i osgoi adroddiadau anghyson.