Algoneurodystrophy, unspecified shoulder

This code represents a complex regional pain syndrome (CRPS) affecting an unspecified shoulder, characterized by chronic pain, swelling, and trophic changes. It is a neurological disorder involving the sympathetic nervous system, often triggered by trauma or surgery.

Apply this code when documentation clearly indicates a diagnosis of algoneurodystrophy or CRPS type I localized to the shoulder, without further specification of laterality. Supporting documentation should describe the characteristic pain, sensory, vasomotor, sudomotor, and/or trophic changes in the affected shoulder.

• Ensure the documentation specifies "unspecified shoulder" or lacks laterality for the shoulder.
• Distinguish from CRPS type II (causalgia), which involves a confirmed nerve injury.
• Consider sequencing with codes for any underlying cause or associated conditions, if applicable.