Mae’r Awdurdod yn cyhoeddi 13 o safonau y mae'n rhaid i sefydliadau trwyddedig eu bodloni, cynnal arolygiadau sy'n mesur yn erbyn y safonau hyn a sicrhau bod y prosesau priodol yn cael eu dilyn. Bydd sefydliadau'n cael eu harolygu'n rheolaidd, fel arfer bob tair blynedd i bum mlynedd yn ôl y risg bosib, gan ganolbwyntio ar y rhai risg uwch  oherwydd natur ei weithgarwch a'r effaith ar gleifion a theuluoedd, pe bai pethau'n mynd o chwith.
The HTA publishes 13 standards that licensed establishments must meet, inspect against these standards and check that appropriate procedures are being followed. They inspect establishments on a cyclical basis, usually every three to five years, according to the potential risk of establishments, focusing on those posing the higher risk, owing to the nature of activity and impact on patients and families if things were to go wrong.