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G90.529

G90.529: Complex regional pain syndrome I of unspecified lower limb

Billable / specific codeICD-10-CMunspecified

G90.529 is a billable, specific ICD-10-CM code for complex regional pain syndrome i of unspecified lower limb. It is valid for submission on a claim.

Check G90.529 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above G90.529

A category’s note binds every code beneath it.

Written on G90.5: Complex regional pain syndrome I (CRPS 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-)

Written on G90: Disorders of autonomic nervous system

  • dysfunction of the autonomic nervous system due to alcohol (G31.2)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

G90.529 is named in 5 Medicare coverage policies: 5 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56607Billing and Coding: Continuous Peripheral Nerve Blocks (CPNB)
  • A57651Billing and Coding: Autonomic Function Tests
  • A57668Billing and Coding: Nerve Conduction Studies and Electromyography
  • A57788Billing and Coding: Peripheral Nerve Blocks

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under G90.52

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.