Z91.011 — Allergy to milk products
Is Z91.011 billable?
No — Z91.011 is a non-billable header code. Z91.011 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath Z91.011.
Z91.011 at a glance
| Code | Z91.011 |
|---|---|
| Description | Allergy to milk products |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with Z91.011 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- lactose intolerance (E73.-)
Excludes2 — not included here — inherited from Z91
The conditions below are not part of Z91.011, but a patient may have both at the same time. When documentation supports it, Z91.011 and the excluded code may both be reported.
Excludes2 — not included here — inherited from Z91.0
The conditions below are not part of Z91.011, but a patient may have both at the same time. When documentation supports it, Z91.011 and the excluded code may both be reported.
- Allergy status to drugs, medicaments, and biological substances (Z88.-)
Excludes2 — not included here — inherited from Z91.01
The conditions below are not part of Z91.011, but a patient may have both at the same time. When documentation supports it, Z91.011 and the excluded code may both be reported.
- food additives allergy status (Z91.02)
Code also — inherited from Z77-Z99
Two codes may be needed to describe the condition fully. Whether Z91.011 is sequenced first depends on the reason for the encounter.
- any follow-up examination (Z08-Z09)
What codes fall under Z91.011? (3)
How long has Z91.011 existed?
Z91.011 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
- FY2026: Z91.011 stopped being billable
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.