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S24.4XXA

S24.4XXA: Injury of thoracic sympathetic nervous system, initial encounter

Billable / specific codeICD-10-CM

S24.4XXA is a billable, specific ICD-10-CM code for injury of thoracic sympathetic nervous system, initial encounter. It is valid for submission on a claim.

Check S24.4XXA with the rest of the claim: free scrubber

7th character "A": initial encounter

The appropriate 7th character is to be added to each code from category S24

A
initial encounter
D
subsequent encounter
S
sequela

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Injury of cardiac plexus
  • Injury of esophageal plexus
  • Injury of pulmonary plexus
  • Injury of stellate ganglion
  • Injury of thoracic sympathetic ganglion

Excludes2 inherited from the categories above S24.4XXA

Not part of this code, but both may be coded when both are present.

Written on S24: Injury of nerves and spinal cord at thorax level

  • injury of brachial plexus (S14.3)

Risk adjustment

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

Medicare coverage

S24.4XXA is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A54969Billing and Coding: Nerve Conduction Studies and Electromyography
  • A56034Billing and Coding: Nerve Blockade for Treatment of Chronic Pain and Neuropathy
  • A56607Billing and Coding: Continuous Peripheral Nerve Blocks (CPNB)
  • A56619Billing and Coding: Nerve Conduction Studies and Electromyography

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under S24.4

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.