E73
Non-billableLactose intolerance
Lactose intolerance
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Child Codes (4)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(20)
UMLS
- AlactasiaC0022951
- Dairy Product IntoleranceC0022951
- Dairy product intoleranceC0022951
- HypolactasiaC0022951
- Intolerance to lactoseC0022951
- Intolerance to lactose (finding)C0022951
- Intolerance, LactoseC0022951
- Lactose IntoleranceC0022951
- Lactose MalabsorptionC0022951
- Lactose intoleranceC0022951
- Lactose intolerance, unspecifiedC0022951
- Lactose malabsorptionC0022951
- Malabsorption, LactoseC0022951
- Milk IntoleranceC0022951
- Milk Sugar IntoleranceC0022951
- Milk intoleranceC0022951
- Milk sugar intoleranceC0022951
- cow's milk enteropathyC0022951
- lactose intoleranceC0022951
- milk intoleranceC0022951
Frequently Asked Questions
What is the ICD-10 code for lactose intolerance?
The ICD-10-CM code for lactose intolerance is E73. The full clinical description is "Lactose intolerance". E73 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code E73 mean?
ICD-10-CM code E73 represents “Lactose intolerance”. It is classified under Chapter 4: Endocrine, Nutritional and Metabolic Diseases and is a non-billable header code. Use a more specific child code for billing purposes.
Is E73 a billable code?
No, E73 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 4 child codes under E73.
What chapter is E73 in?
E73 is in Chapter 4: Endocrine, Nutritional and Metabolic Diseases (codes E00-E89).
What codes cannot be used with E73?
E73 has Excludes1 notes indicating codes that cannot be used together with it, including: transitory endocrine and metabolic disorders specific to newborn (P70-P74); androgen insensitivity syndrome (E34.5-); congenital adrenal hyperplasia (E25.0); and 3 more.
What are the subcategories under E73?
E73 has 4 child codes, including: E73.0 (Congenital lactase deficiency), E73.1 (Secondary lactase deficiency), E73.8 (Other lactose intolerance), E73.9 (Lactose intolerance, unspecified).
What are the UMLS CUIs for E73?
E73 is linked to 1 UMLS Concept Unique Identifier: C0022951. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does E73 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like lactose intolerance affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of E73?
E73 maps to the ICD-11 code: 5C61.6Z (Lactose intolerance, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.