G90.59 Complex regional pain syndrome I of other specified site

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from G90 Disorders of autonomic nervous system

Excludes1 (never code together)

• dysfunction of the autonomic nervous system due to alcohol (G31.2)

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

Applicable to

• Reflex sympathetic dystrophy

Excludes1 (never code together)

• 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-)

MS-DRG index

Defines the logic of DRG(s) 073-074 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 337.29 Reflex sympathetic dystrophy of other specified site (approximate)

Code annotations containing back-references to G90.59

Back-references to G90.5

• Type 1 Excludes: G89.2 Chronic pain, not elsewhere classified ("reflex sympathetic dystrophy (G90.5-)")
• Type 1 Excludes: M89.0 Algoneurodystrophy ("reflex sympathetic dystrophy (G90.5-)")

Diagnosis Index entries for G90.59

• Syndrome › pain › complex regional I › specified site NEC

Nearby codes

• G90.52 Complex regional pain syndrome I of lower limb
• G90.521 Complex regional pain syndrome I of right lower limb
• G90.522 Complex regional pain syndrome I of left lower limb
• G90.523 Complex regional pain syndrome I of lower limb, bilateral
• G90.529 Complex regional pain syndrome I of unspecified lower limb
• G90.59 Complex regional pain syndrome I of other specified site (this code)
• G90.8 Other disorders of autonomic nervous system
• G90.81 Serotonin syndrome
• G90.89 Other disorders of autonomic nervous system
• G90.9 Disorder of the autonomic nervous system, unspecified
• G90.A Postural orthostatic tachycardia syndrome [POTS]