ICD-10-CM > G00-G99 > G89-G99 > G90 > G90.5 G90.5 Complex regional pain syndrome I (CRPS I) Non-Billable/Non-Specific Applicable To Reflex sympathetic dystrophy Type 1 Excludes causalgia of lower limb (G57.7-)causalgia of upper limb (G56.4-)complex regional pain syndrome II of lower limb (G57.7-)complex regional pain syndrome II of upper limb (G56.4-) Codes G90.50Complex regional pain syndrome I, unspecifiedG90.51Complex regional pain syndrome I of upper limbG90.511Complex regional pain syndrome I of right upper limbG90.512Complex regional pain syndrome I of left upper limbG90.513Complex regional pain syndrome I of upper limb, bilateralG90.519Complex regional pain syndrome I of unspecified upper limbG90.52Complex regional pain syndrome I of lower limbG90.521Complex regional pain syndrome I of right lower limbG90.522Complex regional pain syndrome I of left lower limbG90.523Complex regional pain syndrome I of lower limb, bilateralG90.529Complex regional pain syndrome I of unspecified lower limbG90.59Complex regional pain syndrome I of other specified site