ICD-10 Code G90.523 – Complex regional pain syndrome I of lower limb, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G90.523 – Complex regional pain syndrome I of lower limb, bilateral
What it is
G90.523 identifies complex regional pain syndrome type I affecting both lower limbs. It describes persistent regional pain after injury or immobilization, without confirmed nerve injury.
Clinical signs
Typical findings include disproportionate pain, swelling, temperature or color changes, and altered sweating in the affected legs. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents CRPS type I in both lower extremities. The diagnosis should clearly state bilateral involvement, or describe both legs as affected.
Apply it for confirmed type I CRPS, not just nonspecific limb pain or post-traumatic discomfort. If laterality or type is unclear, check documentation before coding.
Do not use for
Do not use this code for CRPS type II or for pain syndromes without a documented CRPS diagnosis. Do not assume bilateral disease from unilateral notes.
Coding tip
Verify both the type and laterality in the assessment, because missing either detail can lead to an incorrect code.