G56.4
Causalgia of upper limb
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
G56.4 is a non-billable ICD-10-CM code header for causalgia of upper limb. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are G56.40 Causalgia of unspecified upper limb, G56.41 Causalgia of right upper limb, G56.42 Causalgia of left upper limb and G56.43 Causalgia of bilateral upper limbs. Its coding notes include 11 Excludes1 entries and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
This code
Inherited from G56 Mononeuropathies of upper limb
- current traumatic nerve disorder - see nerve injury by body region
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 6 Diseases of the nervous system
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Inclusion terms
Conditions classified to this code.
This code
- Complex regional pain syndrome II of upper limb
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 1 entry