Z91.0121 – Allergy to eggs with tolerance to baked egg

ICD-10-CM 2027 diagnosis code · Persons with potential health hazards related to family and personal history and certain conditions influencing health status

Billable code

ICD-10-CM code Z91.0121

Code: Z91.0121 (claims format: Z910121)
Description: Allergy to eggs with tolerance to baked egg
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status
Parent codes: Z91 › Z91.0 › Z91.01 › Z91.012

Notes for Z91.0121

Excludes1 (not coded here):

Allergy to eggs with reactivity to baked egg (Z91.0122)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Z91 – Personal risk factors, not elsewhere classified

Excludes2 (not included here):

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-)

Z91.0 – Allergy status, other than to drugs and biological substances

Excludes2 (not included here):

Allergy status to drugs, medicaments, and biological substances (Z88.-)

Z91.01 – Food allergy status

Excludes2 (not included here):

food additives allergy status (Z91.02)

Block Z77-Z99

Code also:

any follow-up examination (Z08-Z09)

Index terms for Z91.0121

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in Z91.012

Frequently asked questions

What is ICD-10 code Z91.0121?

Z91.0121 is the ICD-10-CM code for allergy to eggs with tolerance to baked egg, in the block Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).

Is Z91.0121 a billable code?

Yes. Z91.0121 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Z91.0121 belong to?

It belongs to category Z91 – Personal risk factors, not elsewhere classified.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.