G90.52

Complex regional pain syndrome I of lower limb

FY2027Chapter 6: Diseases of the nervous system/G89–G99 Other disorders of the nervous system

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

G90.52 is a non-billable ICD-10-CM code header for complex regional pain syndrome I of lower 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 G90.521 Complex regional pain syndrome I of right lower limb; G90.522 Complex regional pain syndrome I of left lower limb; G90.523 Complex regional pain syndrome I of lower limb, bilateral and G90.529 Complex regional pain syndrome I of unspecified lower limb. Its coding notes include 5 Excludes1 entries and 8 Excludes2 entries.

Excludes1

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

Inherited from G90.5 Complex regional pain syndrome I
  • causalgia of lower limb (G57.7-)
  • causalgia of upper limb (G56.4-)
  • complex regional pain syndrome II of lower limb (G57.7-)
  • complex regional pain syndrome II of upper limb (G56.4-)
Inherited from G90 Disorders of autonomic nervous system
  • dysfunction of the autonomic nervous system due to alcohol (G31.2)

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)

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 1 entry

More specific codes under G90.52 4