The term "psychiatric patient" is correct and usable in written English.
For example, you could use it in a sentence like this: "The psychiatric patient was admitted to the hospital for evaluation."
Is it a new psychiatric patient?
Psychiatric patient shouting 'Allahu Akbar' runs down French pedestrians.
The Assistant is intended for adult psychiatric patient profiles only.
The husband of a psychiatric patient was arrested and charged in that attack.
The psychiatric patient as comedian is so unexpected precisely because it challenges preconceptions.
But when is it safe — let alone useful — to joke with a psychiatric patient?
On another occasion, a psychiatric patient cornered her between two trolleys.
In it a boy, again a psychiatric patient, is dressed as an angel.
However, many people were sceptical because I was a recently discharged psychiatric patient.
She played a fellow psychiatric patient of Olivia de Havilland's character in "The Snake Pit" (1948).
It's entirely possible that someone can be both a psychiatric patient and a competent professional.
