G56.42 Causalgia of left upper limb

Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

• complex regional pain syndrome I of lower limb (G90.52-)
• complex regional pain syndrome I of upper limb (G90.51-)
• complex regional pain syndrome II of lower limb (G57.7-)
• reflex sympathetic dystrophy of lower limb (G90.52-)
• reflex sympathetic dystrophy of upper limb (G90.51-)
• current traumatic nerve disorder - see nerve injury by body region
• current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
• neuralgia NOS (M79.2)
• neuritis NOS (M79.2)
• peripheral neuritis in pregnancy (O26.82-)
• radiculitis NOS (M54.1-)