G89 - Pain, not elsewhere classified
G89.2 - Chronic pain, not elsewhere classified
Excludes 1:
-causalgia, lower limb G57.7-)
-causalgia, upper limb G56.4-)
-central pain syndrome G89.0)
-chronic pain syndrome G89.4)
-complex regional pain syndrome II, lower limb G57.7-)
-complex regional pain syndrome II, upper limb G56.4-)
-neoplasm related chronic pain G89.3)
-reflex sympathetic dystrophy G90.5-)
G89.21 - Chronic pain due to trauma
G89.22 - Chronic post-thoracotomy pain
G89.28 - Other chronic postprocedural pain
G89.29 - Other chronic pain