Complex regional pain syndrome I of lower limb, bilateral

This code signifies a chronic pain condition affecting both lower limbs, characterized by severe, burning pain, swelling, and changes in skin temperature or color, without evidence of nerve damage. It represents the non-neuropathic form of complex regional pain syndrome (CRPS) impacting both legs.

Use this code when documentation clearly indicates a diagnosis of CRPS Type I affecting both the left and right lower extremities. Supporting documentation should detail the characteristic symptoms of CRPS I, such as allodynia, hyperalgesia, edema, sudomotor or vasomotor dysfunction, and trophic changes, present bilaterally in the lower limbs.

• Ensure the documentation explicitly states "Type I" or "reflex sympathetic dystrophy" and specifies bilateral involvement of the lower limbs.
• Distinguish from CRPS Type II (G90.529, G90.521, G90.522), which involves confirmed nerve injury.
• Code any associated injuries or conditions that may have precipitated the CRPS, following sequencing guidelines.