ICD-10 Code K90.8 – Other intestinal malabsorption (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K90.8 – Other intestinal malabsorption
What it is
K90.8 identifies intestinal malabsorption that does not fit a more specific ICD-10 category. Use it when the record shows impaired absorption in the intestine, but the exact cause is not documented or is classified elsewhere.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the chart may describe chronic diarrhea, weight loss, bloating, or nutrient deficiency related to poor intestinal absorption.
When to use this code
Use K90.8 when the clinician documents malabsorption and no more specific intestinal malabsorption code applies. It is appropriate for nonspecific or mixed malabsorption findings after evaluation. Make sure the record supports an intestinal absorption problem, not just general gastrointestinal symptoms.
Do not use for
Do not use this code when a specific malabsorption diagnosis is documented, such as celiac disease or pancreatic insufficiency. If the note only says diarrhea, weight loss, or malnutrition without malabsorption, check documentation.
Coding tip
Code K90.8 only when the provider clearly links the condition to intestinal malabsorption and no better-defined code is available.