As of December 2023, 16,812 children and young people in Wales were waiting for an ADHD or autism spectrum disorder (ASD) neurodevelopmental assessment.
Ym mis Rhagfyr 2023, roedd 16,812 o blant a phobl ifanc yng Nghymru yn aros am asesiad niwroddatblygiadol ADHD neu awtistiaeth.