Lactose intolerance

Definition

Lactose intolerance is the inability to digest lactose, a sugar found in milk and some dairy products, due to a deficiency of lactase, the enzyme that metabolizes lactose. Lactose intolerance occurs when lactose is not completely broken down and consequently the sugar cannot be absorbed into the blood.

4 subordinate codes

• 5C61.60Primary lactase deficiency
• 5C61.61Congenital lactase deficiency
• 5C61.62Secondary lactase deficiency
• 4B4ZDiseases of the immune system, unspecified

Nearby in Disorders of carbohydrate absorption or transport

• 5C61.0Glucose-galactose malabsorption
• 5C61.1Maltase-glucoamylase deficiency
• 5C61.2Congenital sucrase-isomaltase deficiency
• 5C61.3Alpha, alpha trehalase deficiency
• 5C61.4Acquired monosaccharide malabsorption
• 5C61.5Disorders of facilitated glucose transport
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified