She WHSSC is responsible for the joint planning and commissioning of specialised and highly specialised Services on behalf of the seven Local Health Boards in Wales.
Mae’r Pwyllgor Gwasanaethau Iechyd Arbenigol yn gyfrifol am gydgynllunio a chomisiynu gwasanaethau arbenigol ac arbenigol iawn ar ran y saith Bwrdd Iechyd Lleol yng Nghymru.