G90.5Complex regional pain syndrome I (CRPS I)

G90.5 is the ICD-10-CM diagnosis code for complex regional pain syndrome I (CRPS I). It belongs to category G90 (disorders of autonomic nervous system), block G89-G99 (other disorders of the nervous system) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within G90 (disorders of autonomic nervous system), G90.5 is specifically for complex regional pain syndrome I (CRPS I). Related codes cover idiopathic peripheral autonomic neuropathy (G90.0), familial dysautonomia [Riley-Day] (G90.1), Horner's syndrome (G90.2), Multi-system degeneration of the autonomic nervous system (G90.3), autonomic dysreflexia (G90.4), other disorders of autonomic nervous system (G90.8), disorder of the autonomic nervous system, unspecified (G90.9), postural orthostatic tachycardia syndrome [POTS] (G90.A) and 1 more.

To report this condition, pick the subcode that matches the documentation: G90.50 (unspecified), G90.51 (limb), G90.52 (limb) and G90.59 (site).

Don't report G90.5 together with the conditions in its Excludes1 note: causalgia of lower limb (G57.7-), causalgia of upper limb (G56.4-), complex regional pain syndrome II of lower limb (G57.7-) and complex regional pain syndrome II of upper limb (G56.4-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.