MCMCB Pro
T17.390S

T17.390SOther foreign object in larynx causing asphyxiation, sequela

Billable / specific codeICD-10-CMPOA exempt

T17.390S is a billable, specific ICD-10-CM code for other foreign object in larynx causing asphyxiation, sequela. It is valid for submission on a claim.

7th character "S" — sequela

The appropriate 7th character is to be added to each code from category T17

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

T17.390S 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

T17.390S is named in 3 Medicare coverage policies 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56621Billing and Coding: Swallowing Studies for Dysphagia
  • A56621Billing and Coding: Swallowing Studies for Dysphagia
  • A57204Billing and Coding: MRI and CT Scans of the Head and Neck

Related codes at this level

Codes that share T17.390. If T17.390S is not quite right, the correct code is usually one of these.

Questions about T17.390S

Is T17.390S a billable ICD-10-CM code?
Yes. T17.390S is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T17.390S sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Effects of foreign body entering through natural orifice (T15-T19).
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.