Z91.011: Allergy to milk products

No longer billable · FY2026

Not billable: this is a header. Use one of the more specific codes below.

• No longer billable from October 1, 2025: it became a header for more specific codes: Z91.0110, Z91.0111, Z91.0112.

Code breakdown

Coding notes

Excludes1

• lactose intolerance (E73.-)

Excludes2 (from Z91.01)

• food additives allergy status (Z91.02)

Excludes2 (from Z91.0)

• Allergy status to drugs, medicaments, and biological substances (Z88.-)

Excludes2 (from Z91)

• contact with and (suspected) exposures hazardous to health (Z77.-)
• exposure to pollution and other problems related to physical environment (Z77.1-)
• female genital mutilation status (N90.81-)
• occupational exposure to risk factors (Z57.-)
• personal history of physical injury and trauma (Z87.81, Z87.82-)

Codes under Z91.011

• Z91.0110 Allergy to milk products, unspecified
• Z91.0111 Allergy to milk products with tolerance to baked milk
• Z91.0112 Allergy to milk products with reactivity to baked milk

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All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.