ICD-10 Code for Intolerance

The ICD-10-CM 2027 alphabetic index lists intolerance with the subterms below. More specific codes depend on the details documented, as listed in the official index (13 codes, 13 billable).

Index entries for Intolerance

carbohydrate – K90.49
disaccharide, hereditary – E73.0
fat NEC – K90.49
- pancreatic – K90.3
food – K90.49
- dietary counseling and surveillance – Z71.3
fructose – E74.10
- hereditary – E74.12
glucose (-galactose) – E74.39
gluten – K90.41
lactose – E73.9
- specified NEC – E73.8
lysine – E72.3
milk NEC – K90.49
- lactose – E73.9
orthostatic, chronic – G90.A
protein – K90.49
starch NEC – K90.49
sucrose (-isomaltose) – E74.31

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.