In psychology a client is a person who is receiving services from a therapist or mental health doctor. The term client is often used interchangeably with the word patient. There is no official distinction from the two different terms - neither is right or wrong. Many therapists use either term or both. Some mental health professionals ask the client/patient what they prefer to be called. Some feel that 'patient' signifies a doctoral relationship and implies that something is 'wrong' with the person that needs to be treated.