It is not very complex - it's probably the MOST difficult disorder to diagnose and treat. In my case, as an example, according to the ICD-10, I have F-60.3, (with F-42.2, F-19.9 (cured and including T-42.4), F-40.1 & 2 and F-32.3. (in layman's terms, OCD, Major Depressive with Psychotic episodes, Multiple drug addiction, Intoxication by benzodiazepinics (suicide attempt with roofies) and ADHD. - but that's ALL just BPD.