Complex regional pain syndrome I of unspecified upper limb

This code signifies Complex Regional Pain Syndrome Type I (CRPS I) affecting an upper limb, where the specific side (left or right) is not documented. CRPS I is a chronic pain condition that typically develops after an injury, stroke, heart attack, or surgery, characterized by severe pain, swelling, changes in skin temperature/color, and motor dysfunction without demonstrable nerve damage.

Apply this code when the patient presents with symptoms consistent with CRPS I in an upper extremity, and the medical record does not specify whether it affects the left or right arm. This is appropriate for initial evaluations or follow-up visits where the laterality remains undetermined or unrecorded. Documentation should clearly support the diagnosis of CRPS I.

• Avoid using this code if laterality (left or right) is documented; instead, choose the more specific G90.511 (right) or G90.512 (left).
• Ensure the documentation explicitly states "Type I" or "CRPS I" to differentiate from CRPS Type II, which involves confirmed nerve damage.
• Always sequence this code as a primary diagnosis when it is the focus of the encounter, or as a secondary diagnosis if it's a co-morbidity impacting care.