Mae'r gwasanaeth archwilwyr meddygol yng Nghymru yn gweithredu'n annibynnol ar y GIG, gan ddarparu gofal ac adborth annibynnol a chynnar gwerthfawr i fyrddau iechyd ac ymddiriedolaethau'r GIG am faterion a all fod yn gysylltiedig â gofal cyn marwolaeth. Yng Nghymru, mae archwilwyr meddygol yn ffordd arall i'r meddyg sy'n ardystio godi pryderon am ofal, y tu allan i'w sefydliadau eu hunain.
The medical examiner service in Wales operates independently of the NHS organisation providing care and can provide valuable independent and early feedback to health boards and NHS trusts about issues, which may be associated with care before death. In Wales, medical examiners provide another means by which the certifying doctor can raise concerns about care, outside their own organisations.