| T18 | 
Foreign body in alimentary tract | 
| T18.0 | 
Foreign body in mouth | 
| T18.0XXA | 
Foreign body in mouth, initial encounter | 
| T18.0XXD | 
Foreign body in mouth, subsequent encounter | 
| T18.0XXS | 
Foreign body in mouth, sequela | 
| T18.1 | 
Foreign body in esophagus | 
| T18.10 | 
Unspecified foreign body in esophagus | 
| T18.100 | 
Unspecified foreign body in esophagus causing compression of trachea | 
| T18.100A | 
Unspecified foreign body in esophagus causing compression of trachea, initial encounter | 
| T18.100S | 
Unspecified foreign body in esophagus causing compression of trachea, sequela | 
| T18.108 | 
Unspecified foreign body in esophagus causing other injury | 
| T18.108A | 
Unspecified foreign body in esophagus causing other injury, initial encounter | 
| T18.108D | 
Unspecified foreign body in esophagus causing other injury, subsequent encounter | 
| T18.108S | 
Unspecified foreign body in esophagus causing other injury, sequela | 
| T18.11 | 
Gastric contents in esophagus | 
| T18.110 | 
Gastric contents in esophagus causing compression of trachea | 
| T18.110A | 
Gastric contents in esophagus causing compression of trachea, initial encounter | 
| T18.110D | 
Gastric contents in esophagus causing compression of trachea, subsequent encounter | 
| T18.110S | 
Gastric contents in esophagus causing compression of trachea, sequela | 
| T18.118 | 
Gastric contents in esophagus causing other injury | 
| T18.118A | 
Gastric contents in esophagus causing other injury, initial encounter | 
| T18.118D | 
Gastric contents in esophagus causing other injury, subsequent encounter | 
| T18.118S | 
Gastric contents in esophagus causing other injury, sequela | 
| T18.12 | 
Food in esophagus | 
| T18.120 | 
Food in esophagus causing compression of trachea | 
| T18.120A | 
Food in esophagus causing compression of trachea, initial encounter | 
| T18.120D | 
Food in esophagus causing compression of trachea, subsequent encounter | 
| T18.120S | 
Food in esophagus causing compression of trachea, sequela | 
| T18.128 | 
Food in esophagus causing other injury | 
| T18.128A | 
Food in esophagus causing other injury, initial encounter | 
| T18.128D | 
Food in esophagus causing other injury, subsequent encounter | 
| T18.128S | 
Food in esophagus causing other injury, sequela | 
| T18.19 | 
Other foreign object in esophagus | 
| T18.190 | 
Other foreign object in esophagus causing compression of trachea | 
| T18.190A | 
Other foreign object in esophagus causing compression of trachea, initial encounter | 
| T18.190D | 
Other foreign object in esophagus causing compression of trachea, subsequent encounter | 
| T18.190S | 
Other foreign object in esophagus causing compression of trachea, sequela | 
| T18.198 | 
Other foreign object in esophagus causing other injury | 
| T18.198A | 
Other foreign object in esophagus causing other injury, initial encounter | 
| T18.198D | 
Other foreign object in esophagus causing other injury, subsequent encounter | 
| T18.198S | 
Other foreign object in esophagus causing other injury, sequela | 
| T18.2 | 
Foreign body in stomach | 
| T18.2XXA | 
Foreign body in stomach, initial encounter | 
| T18.2XXD | 
Foreign body in stomach, subsequent encounter | 
| T18.2XXS | 
Foreign body in stomach, sequela | 
| T18.3 | 
Foreign body in small intestine | 
| T18.3XXA | 
Foreign body in small intestine, initial encounter | 
| T18.3XXD | 
Foreign body in small intestine, subsequent encounter | 
| T18.3XXS | 
Foreign body in small intestine, sequela | 
| T18.4 | 
Foreign body in colon | 
| T18.4XXA | 
Foreign body in colon, initial encounter | 
| T18.4XXD | 
Foreign body in colon, subsequent encounter | 
| T18.4XXS | 
Foreign body in colon, sequela | 
| T18.5 | 
Foreign body in anus and rectum | 
| T18.5XXA | 
Foreign body in anus and rectum, initial encounter | 
| T18.5XXD | 
Foreign body in anus and rectum, subsequent encounter | 
| T18.5XXS | 
Foreign body in anus and rectum, sequela | 
| T18.8 | 
Foreign body in other parts of alimentary tract | 
| T18.8XXA | 
Foreign body in other parts of alimentary tract, initial encounter | 
| T18.8XXD | 
Foreign body in other parts of alimentary tract, subsequent encounter | 
| T18.8XXS | 
Foreign body in other parts of alimentary tract, sequela | 
| T18.9 | 
Foreign body of alimentary tract, part unspecified | 
| T18.9XXA | 
Foreign body of alimentary tract, part unspecified, initial encounter | 
| T18.9XXD | 
Foreign body of alimentary tract, part unspecified, subsequent encounter | 
| T18.9XXS | 
Foreign body of alimentary tract, part unspecified, sequela |