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