Z91.011
Non-billableAllergy to milk products
Z91.011 is the ICD-10-CM code for Allergy to milk products. It is a non-billable category code — use a more specific child code such as Z91.0110 for billing.
Z00-Z99 Factors influencing health status and contact with health services
What this means — in plain language
MedlinePlus · NIHWhat is a food allergy? A food allergy is an abnormal immune system reaction to certain foods. Your immune system normally protects you from germs. But if you have a food allergy, your immune system mistakenly reacts to certain foods as if they were harmful. This reaction is usually mild. But in some cases, it can be serious or even life-threatening. A food intolerance is different than a food allergy. If you have a…
Read more about Food Allergy at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •lactose intolerance (E73.-)
Frequently asked questions
- What is ICD-10 code Z91.011?
- Z91.011 is the ICD-10-CM code for "Allergy to milk products". It falls under Z00-Z99 Factors influencing health status and contact with health services.
- Is Z91.011 a billable code?
- No — Z91.011 is a non-billable header code. Use a more specific child code (such as Z91.0110) for billing.
- What are the subcodes of Z91.011?
- Z91.011 has 3 more specific child codes, including Z91.0110, Z91.0111, Z91.0112.
- What is excluded from Z91.011?
- Excludes1 (not coded here): lactose intolerance (E73.-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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