S24.4XXA — Injury of thoracic sympathetic nervous system, initial encounter
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.
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
Risk adjustment
S24.4XXA does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
S24.4XXA is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- 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
S24.4XXA has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share S24.4. If S24.4XXA is not quite right, the correct code is usually one of these.
Questions about S24.4XXA
- Is S24.4XXA a billable ICD-10-CM code?
- Yes. S24.4XXA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S24.4XXA sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the thorax (S20-S29).