ICD-10-CM Code T18.3XXA

Foreign body in small intestine, initial encounter

Version 2020 Billable Code

Valid for Submission

T18.3XXA is a billable code used to specify a medical diagnosis of foreign body in small intestine, initial encounter. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code T18.3XXA might also be used to specify conditions or terms like enteritis of small intestine caused by foreign body, foreign body at terminal ileum, foreign body in duodenum, foreign body in ileum, foreign body in intestine and colon, foreign body in jejunum, etc

Short Description:Foreign body in small intestine, initial encounter
Long Description:Foreign body in small intestine, initial encounter


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Enteritis of small intestine caused by foreign body
  • Foreign body at terminal ileum
  • Foreign body in duodenum
  • Foreign body in ileum
  • Foreign body in intestine and colon
  • Foreign body in jejunum
  • Foreign body in small intestine
  • Intestinal trichobezoar
  • Trichobezoar
  • Ulcer of small intestine caused by foreign body

Diagnostic Related Groups

The ICD-10 code T18.3XXA is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2020 through 09/30/2020.


Convert T18.3XXA to ICD-9

  • 936 - FB in intestine & colon (Combination Flag)
  • E915 - FB entering oth orifice (Combination Flag)

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Effects of foreign body entering through natural orifice (T15-T19)
      • Foreign body in alimentary tract (T18)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients

Foreign Bodies

If you've ever gotten a splinter or had sand in your eye, you've had experience with a foreign body. A foreign body is something that is stuck inside you but isn't supposed to be there. You may inhale or swallow a foreign body, or you may get one from an injury to almost any part of your body. Foreign bodies are more common in small children, who sometimes stick things in their mouths, ears, and noses.

Some foreign bodies, like a small splinter, do not cause serious harm. Inhaled or swallowed foreign bodies may cause choking or bowel obstruction and may require medical care.

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