A medical condition is a broad term that includes all diseases, lesions and disorders.
While the term medical condition generally includes mental illnesses, in some contexts the term is used specifically to denote any illness, injury, or disease except for mental illnesses. The Diagnostic and Statistical Manual of Mental Disorders (DSM) uses the term general medical condition to refer to all diseases, illnesses, and injuries except for mental disorders.
As it is more value-neutral than terms like disease, the term medical condition is sometimes preferred by people with health issues that they do not consider deleterious.
The term medical condition is also a synonym for medical state, in which case it describes an individual patient's current state from a medical standpoint.