DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T18 Foreign body in alimentary tract

  • Header · not billable
  • Codes take a 7th character

T18 is not billable. The category heads 45 billable codes in FY2027, grouped under 8 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. T15-T19 Effects of foreign body entering through natural orifice (T15-T19)
  3. T18 Foreign body in alimentary tract
Billable codes
45
Subdivisions
8
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
63

Codes in T18

  1. T18.0
    Foreign body in mouth +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  2. T18.1
    Foreign body in esophagus
    Header
    Excludes2 1

    Excludes2

    • foreign body in respiratory tract (T17.-) T17
  3. T18.10
    Unspecified foreign body in esophagus
    Header
  4. T18.100
    Unspecified foreign body in esophagus causing compression of trachea +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Unspecified foreign body in esophagus causing obstruction of respiration
  5. T18.108
    Unspecified foreign body in esophagus causing other injury +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T18.11
    Gastric contents in esophagus
    Header
    Inclusion terms 1

    Inclusion terms

    • Vomitus in esophagus
  7. T18.110
    Gastric contents in esophagus causing compression of trachea +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Gastric contents in esophagus causing obstruction of respiration
  8. T18.118
    Gastric contents in esophagus causing other injury +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T18.12
    Food in esophagus
    Header
    Inclusion terms 2

    Inclusion terms

    • Bones in esophagus
    • Seeds in esophagus
  10. T18.120
    Food in esophagus causing compression of trachea +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Food in esophagus causing obstruction of respiration
  11. T18.128
    Food in esophagus causing other injury +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. T18.19
    Other foreign object in esophagus
    Header
  13. T18.190
    Other foreign object in esophagus causing compression of trachea +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Other foreign body in esophagus causing obstruction of respiration
  14. T18.198
    Other foreign object in esophagus causing other injury +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  15. T18.2
    Foreign body in stomach +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T18.3
    Foreign body in small intestine +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. T18.4
    Foreign body in colon +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. T18.5
    Foreign body in anus and rectum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Foreign body in rectosigmoid (junction)
  19. T18.8
    Foreign body in other parts of alimentary tract +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. T18.9
    Foreign body of alimentary tract, part unspecified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 2

    Inclusion terms

    • Foreign body in digestive system NOS
    • Swallowed foreign body NOS

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At T18

Excludes2

  • foreign body in pharynx (T17.2-) T17.2

Notes that also apply

Block T15-T19 instructions (Excludes2 4, Use additional code 1): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for T18 defined here

The appropriate 7th character is to be added to each code from category T18

7th characters for T18
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Index entries

  • Hairball in stomach → T18.2
  • Bezoar → T18.9
  • Phytobezoar → T18.9
  • Trichobezoar → T18.9
  • Trichophytobezoar → T18.9
  • Foreign bodyesophagus → T18.108
  • Bezoarstomach → T18.2
  • Phytobezoarstomach → T18.2
  • Trichobezoarstomach → T18.2
  • Trichophytobezoarstomach → T18.2
  • Bezoarintestine → T18.3
  • Phytobezoarintestine → T18.3
  • Trichobezoarintestine → T18.3
  • Trichophytobezoarintestine → T18.3
  • Foreign bodyalimentary tract → T18.9
  • Foreign bodyingestion, ingested NOS → T18.9
  • Foreign bodyswallowed → T18.9
  • Foreign bodyalimentary tractmouth → T18.0
  • Foreign bodyentering through orificealveolar process → T18.0
  • Foreign bodyentering through orificebuccal cavity → T18.0
  • Foreign bodyentering through orificegum → T18.0
  • Foreign bodyentering through orificemouth → T18.0
  • Foreign bodyentering through orificeoral cavity → T18.0
  • Foreign bodyentering through orificepalate → T18.0
  • Foreign bodyentering through orificetongue → T18.0
  • Foreign bodyalimentary tractstomach → T18.2
  • Foreign bodyentering through orificestomach → T18.2
  • Foreign bodyalimentary tractsmall intestine → T18.3
  • Foreign bodyentering through orificeduodenum → T18.3
  • Foreign bodyentering through orificeileum → T18.3
  • Foreign bodyentering through orificeintestine (small) → T18.3
  • Foreign bodyentering through orificesmall intestine → T18.3
  • Foreign bodyalimentary tractcolon → T18.4
  • Foreign bodyentering through orificeappendix → T18.4
  • Foreign bodyentering through orificececum → T18.4
  • Foreign bodyentering through orificecolon → T18.4
  • Foreign bodyentering through orificelarge intestine → T18.4
  • Foreign bodyalimentary tractanus → T18.5
  • Foreign bodyalimentary tractrectosigmoid (junction) → T18.5
  • Foreign bodyalimentary tractrectum → T18.5

23 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy