Alphabetic Index FY2027

G57.70

Causalgia of unspecified lower limb

FY2027Chapter 6: Diseases of the nervous system/G50–G59 Nerve, nerve root and plexus disorders

BillableComplete code, valid to report

G57.70 (also written G5770) is a billable ICD-10-CM diagnosis code for causalgia of unspecified lower limb. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 40 codes in category G57 (Mononeuropathies of lower limb). Its coding notes include 11 Excludes1 entries and 8 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from G57.7 Causalgia of lower limb
  • 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 upper limb (G56.4-)
  • reflex sympathetic dystrophy of lower limb (G90.52-)
  • reflex sympathetic dystrophy of upper limb (G90.51-)
Inherited from G57 Mononeuropathies of lower limb
  • current traumatic nerve disorder - see nerve injury by body region
Also from chapter/block level (5 notes)
Inherited from G50–G59 Nerve, nerve root and plexus disorders
  • 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-)

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)