Algoneurodystrophy, right upper arm

This code represents algoneurodystrophy, also known as Complex Regional Pain Syndrome (CRPS) Type I, specifically affecting the patient's right upper arm. It is characterized by chronic, severe pain, swelling, and trophic changes in the affected limb, typically developing after trauma or surgery, but without direct nerve injury.

Use this code when documentation clearly indicates a diagnosis of algoneurodystrophy or CRPS Type I localized to the right upper arm. Supporting documentation should describe the characteristic symptoms such as disproportionate pain, allodynia, hyperalgesia, edema, sudomotor abnormalities, and/or trophic changes in the specified limb.

• Ensure laterality is explicitly documented as "right upper arm" to support this specific code.
• Distinguish from CRPS Type II (causalgia), which involves a confirmed nerve injury and is coded differently.
• Look for associated conditions or precipitating events (e.g., fracture, surgery) that may require additional coding.