Final answer:
Factitious disorder is the diagnosis when an individual intentionally fabricates physical or psychological illness for attention or sympathy.
Step-by-step explanation:
The diagnosis for an individual intentionally fabricating physical or psychological illness is factitious disorder. Factitious disorder is a mental illness in which a person pretends to have a physical or mental illness, or intentionally produces symptoms of an illness, in order to gain attention or sympathy. This behavior is not motivated by external incentives such as financial gain.