Intestinal disaccharidase deficiencies and disaccharide malabsorption

This code identifies conditions where the small intestine lacks or has insufficient enzymes (disaccharidases) to break down disaccharides (e.g., lactose, sucrose, maltose) into absorbable monosaccharides. This deficiency leads to malabsorption of these specific sugars, causing gastrointestinal symptoms.

Apply this code for documented diagnoses of lactase deficiency, sucrase-isomaltase deficiency, or other specific disaccharidase deficiencies confirmed by enzyme assays or hydrogen breath tests. It is appropriate when the patient presents with symptoms like bloating, diarrhea, and abdominal pain after ingesting disaccharide-containing foods.

• Distinguish from general malabsorption syndromes (e.g., celiac disease) which have broader nutrient malabsorption.
• Ensure documentation specifies the type of disaccharidase deficiency if known, though this code covers unspecified types.
• Consider sequencing with codes for associated symptoms (e.g., diarrhea, abdominal pain) if they are not integral to the diagnosis itself.