ICD-10-CM 2027
ICD-10 code for allergy food
From the official ICD-10-CM alphabetic index entry “Food › allergy”. Page updated September 29, 2026.
About coding allergy food
The ICD-10-CM code for allergy food is L27.2 (Dermatitis due to ingested food).
Within L27 (dermatitis due to substances taken internally), L27.2 is specifically for dermatitis due to ingested food. Related codes cover generalized skin eruption due to drugs and medicaments taken internally (L27.0), localized skin eruption due to drugs and medicaments taken internally (L27.1), dermatitis due to other substances taken internally (L27.8) and dermatitis due to unspecified substance taken internally (L27.9).
The conditions in its Excludes2 note aren't part of L27.2, but may be coded alongside it if the patient has both: dermatitis due to food in contact with skin (L23.6, L24.6, L25.4).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about allergy food ICD-10 codes
What is the ICD-10 code for allergy food?
- L27.2 — Dermatitis due to ingested food.
Is L27.2 billable?
- Yes. L27.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L27.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L27.2 as a principal diagnosis.
Is L27.2 a CC or MCC?
- No. L27.2 is neither a CC nor an MCC under MS-DRG v44.0.