ICD-10 Code G90.512 – Complex regional pain syndrome I of left upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G90.512 – Complex regional pain syndrome I of left upper limb
What it is
G90.512 identifies complex regional pain syndrome type I affecting the left upper limb. Use it for persistent regional pain after injury or illness when there is no confirmed nerve lesion.
Clinical signs
Typical findings include continuing pain that is disproportionate to the original event, plus sensory, vasomotor, sudomotor, or motor/trophic changes. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents CRPS type I in the left arm, forearm, wrist, hand, or shoulder region. The record should support the left-sided upper-limb involvement and the type I diagnosis. If laterality or type is unclear, check documentation before coding.
Do not use for
Do not use this code for CRPS type II, which requires a documented nerve injury, or for pain without a confirmed CRPS diagnosis. Check documentation if the chart only says “neuropathy” or “chronic pain.”
Coding tip
Verify both laterality and CRPS type in the provider note before assigning G90.512.