Z91.012
Allergy to eggs
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
Z91.012 is a non-billable ICD-10-CM code header for allergy to eggs. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Z91.0120 Allergy to eggs, unspecified; Z91.0121 Allergy to eggs with tolerance to baked egg and Z91.0122 Allergy to eggs with reactivity to baked egg. Its coding notes include a Code also instruction and 7 Excludes2 entries.
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
Also from chapter/block level (1 note)
Inherited from Z77–Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status
- any follow-up examination (Z08-Z09)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Inherited from Z91.0 Allergy status, other than to drugs and biological substances
- Allergy status to drugs, medicaments, and biological substances (Z88.-)
Inherited from Z91 Personal risk factors, not elsewhere classified
Notes
Also from chapter/block level (3 notes)
Inherited from Chapter 21 Factors influencing health status and contact with health services
- Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
- (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
- (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.