Z91.0 — Allergy status, other than to drugs and biological substances
Z91.0 is a non-billable header ICD-10-CM code for allergy status, other than to drugs and biological substances. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes2 — not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- Allergy status to drugs, medicaments, and biological substances (Z88.-)
Other codes that can never be billed with Z91.0
These codes carry an Excludes1 note pointing at Z91.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Z91.0 alone.
Risk adjustment
Z91.0 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.
Code to one of these instead Z91.0
5 child codes. Green means billable.
Related codes at this level
Codes that share Z91. If Z91.0 is not quite right, the correct code is usually one of these.
- Z91.1Patient's noncompliance with medical treatment and regimen
- Z91.ACaregiver's noncompliance with patient's medical treatment and regimen
- Z91.4Personal history of psychological trauma, not elsewhere classified
- Z91.5Personal history of self-harm
- Z91.8Other specified personal risk factors, not elsewhere classified
- Z91.BPersonal risk factor of exposure to diethylstilbestrol
Questions about Z91.0
- Is Z91.0 a billable ICD-10-CM code?
- No. Z91.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Z91.0 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).