Z91.0111 — Allergy to milk products with tolerance to baked milk
Z91.0111 is a billable, specific ICD-10-CM code for allergy to milk products with tolerance to baked milk. It is valid for submission on a claim.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- Allergy to milk products with reactivity to baked milk (Z91.0112)
Excludes1 inherited from the categories above Z91.0111
These are not written on Z91.0111, but they bind it: a note on a category applies to every code beneath it. Billing Z91.0111 with anything listed here is a denial.
Excludes2 inherited from the categories above Z91.0111
Also inherited, and the opposite of Excludes1: these conditions are not part of Z91.0111, but a patient can have both, so you may code both.
Written on Z91.0 — Allergy status, other than to drugs and biological substances
- Allergy status to drugs, medicaments, and biological substances (Z88.-)
Written on Z91 — Personal risk factors, not elsewhere classified
Other codes that can never be billed with Z91.0111
These codes carry an Excludes1 note pointing at Z91.0111. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Z91.0111 alone.
- Z91.0112Allergy to milk products with reactivity to baked milk
Risk adjustment
Z91.0111 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
Z91.0111 is named in 24 Medicare coverage policies — 24 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56558Billing and Coding: Allergy Testing
- A56558Billing and Coding: Allergy Testing
- A56558Billing and Coding: Allergy Testing
- A56559Billing and Coding: Allergy Skin Testing
How Z91.0111 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Z91.0111.
- Allergy, allergic›milk protein›with›tolerance to baked milk
- Allergy, allergic›food NEC›status›milk products›with›tolerance to baked milk
- History›personal›allergy›food›milk products›with›tolerance to baked milk
Code history
What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.
- addedFY2024-FY2026
Allergy to milk products with tolerance to baked milk
Related codes at this level
Codes that share Z91.011. If Z91.0111 is not quite right, the correct code is usually one of these.
Questions about Z91.0111
- Is Z91.0111 a billable ICD-10-CM code?
- Yes. Z91.0111 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Z91.0111 sit in the tabular list?
- Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).
- What cannot be coded together with Z91.0111?
- Z91.0111 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above Z91.0111 (Z91.011) and apply to it just the same.