ICD-10 Code G90.50 – Complex regional pain syndrome I, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G90.50 – Complex regional pain syndrome I, unspecified
What it is
G90.50 identifies complex regional pain syndrome type I when the affected limb or body region is not further specified. Use it for a diagnosis of CRPS without documented nerve injury and without a more specific site.
Clinical signs
Typical findings include persistent regional pain disproportionate to the injury, plus sensory, vasomotor, sudomotor, or motor changes. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record supports CRPS type I but does not name the involved extremity or another more specific site. It also fits when the clinician documents “complex regional pain syndrome I” without further detail. If laterality or location is documented, code more specifically when available.
Do not use for
Do not use this code for CRPS type II, which involves nerve injury, or for nonspecific chronic pain without a CRPS diagnosis. Check documentation if the chart only mentions neuropathic pain or post-traumatic pain.
Coding tip
Query for laterality, site, and type when the note says CRPS but leaves the diagnosis incomplete.