A patient may be suspended from the waiting list for medical reasons, for example because they are unfit to undergo treatment, or for social reasons such as going overseas for a period of time.
Gall claf gael ei ohirio o'r rhestr aros am resymau meddygol, er enghraifft, oherwydd nad yw'n ffit i gael triniaeth, neu am resymau cymdeithasol megis os yw'n mynd dramor am gyfnod.