| K58 | Irritable bowel syndrome | NON-BILLABLE CODE |
| K58.0 | Irritable bowel syndrome with diarrhea | BILLABLE CODE |
| K58.2 | Mixed irritable bowel syndrome | BILLABLE CODE |
| K58.8 | Other irritable bowel syndrome | BILLABLE CODE |
| K58.9 | Irritable bowel syndrome without diarrhea | BILLABLE CODE |
