Algoneurodystrophy, left thigh

This code describes algoneurodystrophy, also known as Complex Regional Pain Syndrome (CRPS) Type I, affecting the left thigh. It is a chronic pain condition characterized by severe, burning pain, swelling, and trophic changes in the affected limb, without evidence of major nerve injury.

Use this code when documentation clearly indicates a diagnosis of CRPS Type I localized to the left thigh. This typically follows a trauma, surgery, or other precipitating event, and the patient presents with characteristic symptoms like allodynia, hyperalgesia, edema, and skin/nail changes in the specified area.

• Ensure the documentation specifies "algoneurodystrophy" or "CRPS Type I" and clearly identifies the left thigh as the affected site.
• Distinguish from CRPS Type II (causalgia), which involves a confirmed nerve injury and is coded differently.
• Always review for any underlying conditions or precipitating events that may require additional coding.