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S04.32XA

S04.32XAInjury of trigeminal nerve, left side, initial encounter

Billable / specific codeICD-10-CMleft

S04.32XA is a billable, specific ICD-10-CM code for injury of trigeminal nerve, left side, 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 S04

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

S04.32XA 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

S04.32XA is named in 5 Medicare coverage policies 5 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A54095Billing and Coding: Nerve Conduction Studies and Electromyography
  • A56612Billing and Coding: CT of the Head
  • A56773Billing and Coding: Neurophysiology Evoked Potentials (NEPs)
  • A57123Billing and Coding: Nerve Conduction Studies and Electromyography

Related codes at this level

Codes that share S04.32. If S04.32XA is not quite right, the correct code is usually one of these.

Questions about S04.32XA

Is S04.32XA a billable ICD-10-CM code?
Yes. S04.32XA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S04.32XA sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the head (S00-S09).
ICD-10-CMFY2026-Apr· effective April 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.