ICD-10-CM diagnosis code
Z91.0110 Allergy to milk products, unspecified
- Billable
- Yes, a complete code (FY2026)
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Other codes in Z91
62 complete codes in this category.
- Z91.010Allergy to peanuts
- Z91.0110Allergy to milk products, unspecified
- Z91.0111Allergy to milk products with tolerance to baked milk
- Z91.0112Allergy to milk products with reactivity to baked milk
- Z91.0120Allergy to eggs, unspecified
- Z91.0121Allergy to eggs with tolerance to baked egg
- Z91.0122Allergy to eggs with reactivity to baked egg
- Z91.013Allergy to seafood
- Z91.014Allergy to mammalian meats
- Z91.018Allergy to other foods
- Z91.02Food additives allergy status
- Z91.030Bee allergy status
Documentation tips
- Make sure the note supports every element of the title, “Allergy to milk products, unspecified”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to Z91.
The international WHO ICD-10 also has Z91, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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