F45.4 Persistent Somatoform Pain Differential Diagnosis
pain presumed to be of psychological origin occurring during the course of depression or schizophrenia
pain due to known or inferred physiological mechanism such as muscle tension pain or migraine but still believed to have psychological cause are coded as P54
the somatoform pain disorder has to be differentiated from histrionic behaviour in reaction to organic pain
Excluded backache NOS (M54.9), pain NOS (acute, chronic) (R52.-), tension type headache (G44.2).