T18.9XXS — Foreign body of alimentary tract, part unspecified, sequela
T18.9XXS is a billable, specific ICD-10-CM code for foreign body of alimentary tract, part unspecified, 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 T18
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Foreign body in digestive system NOS
- Swallowed foreign body NOS
Risk adjustment
T18.9XXS 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
T18.9XXS is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy
Code history
T18.9XXS 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 T18.9. If T18.9XXS is not quite right, the correct code is usually one of these.
Questions about T18.9XXS
- Is T18.9XXS a billable ICD-10-CM code?
- Yes. T18.9XXS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T18.9XXS 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).