Complex regional pain syndrome I of left lower limb

📋Clinical Description

This code signifies a non-neuropathic form of complex regional pain syndrome (CRPS) affecting the left lower extremity. CRPS I is characterized by severe, persistent pain, swelling, changes in skin temperature and color, and functional impairment, typically following trauma or surgery, without evidence of major nerve damage.

🎯When to Use

Apply this code when documentation clearly indicates a diagnosis of CRPS Type I localized to the patient's left leg, foot, or ankle. Supporting documentation should detail the characteristic signs and symptoms of CRPS I and explicitly rule out a specific nerve lesion.

💡Coding Tips

Ensure laterality is precisely documented; separate codes exist for the right lower limb and bilateral involvement.
Distinguish CRPS I (reflex sympathetic dystrophy) from CRPS II (causalgia), which involves confirmed nerve injury.
Look for terms like "reflex sympathetic dystrophy" or "Sudeck's atrophy" when considering CRPS I.

AI-generated reference — verify against official guidelines

Code Hierarchy

▲G90.52Complex regional pain syndrome I of lower limb

G90.522(current)

Crosswalks

337.22ApproxICD-9

Same Category

G90Disorders of autonomic nervous system G90.0Idiopathic peripheral autonomic neuropathy G90.01Carotid sinus syncope G90.09Other idiopathic peripheral autonomic neuropathy G90.1Familial dysautonomia [Riley-Day]