| K90 | Intestinal malabsorption | NON-BILLABLE CODE |
| K90.0 | Celiac disease | BILLABLE CODE |
| K90.1 | Tropical sprue | BILLABLE CODE |
| K90.2 | Blind loop syndrome, not elsewhere classified | BILLABLE CODE |
| K90.4 | Other malabsorption due to intolerance | NON-BILLABLE CODE |
| K90.41 | Non-celiac gluten sensitivity | BILLABLE CODE |
| K90.49 | Malabsorption due to intolerance, not elsewhere classified | BILLABLE CODE |
| K90.8 | Other intestinal malabsorption | NON-BILLABLE CODE |
| K90.81 | Whipple's disease | BILLABLE CODE |
| K90.82 | Short bowel syndrome | NON-BILLABLE CODE |
| K90.821 | Short bowel syndrome with colon in continuity | BILLABLE CODE |
| K90.822 | Short bowel syndrome without colon in continuity | BILLABLE CODE |
| K90.829 | Short bowel syndrome, unspecified | BILLABLE CODE |
| K90.83 | Intestinal failure | BILLABLE CODE |
| K90.89 | Other intestinal malabsorption | BILLABLE CODE |
| K90.9 | Intestinal malabsorption, unspecified | BILLABLE CODE |
