Figure 1.

ICD-11 classification of pediatric chronic pain referrals. Patients (n=285) were assigned ICD-11 parent codes. Of those, 123 patients were assigned CPP as a main parent code, and 162 patients were assigned a CSP as a main code: chronic cancer pain (n=1), chronic postsurgical and posttraumatic pain (n=66), chronic neuropathic pain (n=30), chronic headache and facial pain (n= 19), chronic visceral pain (n=22), or chronic musculoskeletal pain (n=51). In patients with primary pain as the main parent code, 95/123 were assigned an adjunct parent code. In patients with secondary pain as a main parent code, 99/162 were assigned an adjunct parent code.