ICD-10 Code G90.5 – Complex regional pain syndrome I (CRPS I) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G90.5 – Complex regional pain syndrome I (CRPS I)
What it is
G90.5 identifies complex regional pain syndrome type I, a chronic pain condition that usually follows injury or immobilization and occurs without confirmed nerve injury. It reflects pain and autonomic changes in an affected limb.
Clinical signs
Typical findings include persistent regional pain that is disproportionate to the original event, plus swelling, temperature or color changes, and altered sweating. Clinical features vary; refer to documentation.
When to use this code
Use G90.5 when the provider documents CRPS type I, reflex sympathetic dystrophy, or similar terminology without evidence of a specific nerve lesion. Apply it for limb pain syndromes with documented autonomic or trophic changes. Check documentation if the record does not clearly distinguish type I from type II.
Do not use for
Do not use this code for CRPS type II, which involves confirmed nerve injury. Avoid it when the diagnosis is only suspected or when the pain condition is better explained by another documented disorder.
Coding tip
Confirm the provider’s exact CRPS type and whether nerve injury is documented before assigning G90.5.