ICD-10-CM > Z00-Z99 > Z77-Z99 > Z91 > Z91.0 > Z91.01 > Z91.011 Z91.011 Allergy to milk products Non-Billable/Non-Specific Type 1 Excludes lactose intolerance (E73.-) Codes Z91.0110Allergy to milk products, unspecifiedZ91.0111Allergy to milk products with tolerance to baked milkZ91.0112Allergy to milk products with reactivity to baked milk