Is Z91.01 a billable ICD-10-CM code?

No. Z91.01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Z91.01 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).

Z91.01

Z91.01 — Food allergy status

Non-billable headerICD-10-CM

Z91.01 is a non-billable header ICD-10-CM code for food allergy status. 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.

food additives allergy status (Z91.02)

Excludes2 inherited from the categories above Z91.01

Also inherited, and the opposite of Excludes1: these conditions are not part of Z91.01, 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

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-)

Other codes that can never be billed with Z91.01

These codes carry an Excludes1 note pointing at Z91.01. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Z91.01 alone.

Z91.0111Allergy to milk products with tolerance to baked milk
Z91.0112Allergy to milk products with reactivity to baked milk
Z91.0121Allergy to eggs with tolerance to baked egg
Z91.0122Allergy to eggs with reactivity to baked egg

Risk adjustment

Z91.01 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 history

Z91.01 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead Z91.01

6 child codes. Green means billable.

Related codes at this level

Codes that share Z91.0. If Z91.01 is not quite right, the correct code is usually one of these.

Questions about Z91.01

Is Z91.01 a billable ICD-10-CM code?: No. Z91.01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Z91.01 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).