Causalgia of right upper limb

This code signifies a diagnosis of causalgia affecting the right upper extremity. Causalgia, also known as Complex Regional Pain Syndrome (CRPS) Type II, is a chronic pain condition characterized by severe burning pain, allodynia, and hyperalgesia, typically occurring after a nerve injury. The pain is disproportionate to the inciting event and often accompanied by autonomic and trophic changes.

Use this code when documentation clearly indicates a diagnosis of causalgia specifically localized to the patient's right upper limb, following a confirmed nerve injury. Supporting documentation should detail the nerve injury, the onset of severe burning pain, and associated symptoms like allodynia, hyperalgesia, or vasomotor/sudomotor dysfunction in the affected limb.

• Ensure the documentation specifies "causalgia" or "CRPS Type II" and clearly identifies the right upper limb as the affected area.
• Distinguish from CRPS Type I (reflex sympathetic dystrophy), which does not involve a confirmed nerve injury.
• Code any underlying nerve injury or associated conditions separately, following sequencing guidelines.