ICD-10 Code K90.89 – Other Intestinal Malabsorption (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K90.89 – Other intestinal malabsorption
What it is
K90.89 identifies intestinal malabsorption that does not fit a more specific ICD-10-CM malabsorption code. Use it when documentation states a non-specific or other type of impaired nutrient absorption in the intestine.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include chronic diarrhea, weight loss, bloating, and nutrient deficiencies, but the record should support malabsorption rather than another digestive disorder.
When to use this code
Use K90.89 when the provider documents intestinal malabsorption and does not name a more specific cause such as celiac disease or pancreatic insufficiency. It also fits cases labeled “other” or unspecified malabsorption after evaluation. Check the note for the exact disorder and whether a more specific code applies.
Do not use for
Do not use this code when the chart identifies a specific malabsorption condition with its own code. If documentation only describes diarrhea, weight loss, or nutritional deficiency without malabsorption, code the documented diagnosis instead.
Coding tip
Confirm that “malabsorption” is explicitly documented before assigning K90.89, and query if the cause is unclear or a more specific diagnosis may apply.