Algoneurodystrophy, left forearm

This code describes algoneurodystrophy, also known as Complex Regional Pain Syndrome (CRPS) Type I, affecting the left forearm. It is a chronic pain condition characterized by severe pain, swelling, changes in skin temperature and color, and limited range of motion in the affected limb, without nerve injury.

Use this code when documentation specifies a diagnosis of algoneurodystrophy or CRPS Type I localized to the left forearm. Supporting documentation should include clinical findings consistent with CRPS, such as allodynia, hyperalgesia, edema, sudomotor dysfunction, or trophic changes.

• Ensure laterality is clearly documented as "left forearm" to support this specific code.
• Distinguish from CRPS Type II (causalgia), which involves a confirmed nerve injury and would be coded differently.
• Code any associated injuries or conditions that may have precipitated the CRPS, following sequencing guidelines.