Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.
Applies from 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-)
Applies from Z91.0 Allergy status, other than to drugs and biological substances
Excludes2 (not included here)
Allergy status to drugs, medicaments, and biological substances (Z88.-)
Applies from Z91.01 Food allergy status
Excludes2 (not included here)
food additives allergy status (Z91.02)
MS-DRG index
Defines the logic of DRG(s) 951 in MDC 23.
Medicare Code Edits (MCE v43.1 (April 2026))
Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.
Code annotations containing back-references to Z91.0120
Back-references to Z91.01
Use Additional: K52.2 Allergic and dietetic gastroenteritis and colitis ("code to identify type of food allergy (Z91.01-, Z91.02-)")
Back-references to Z91.0
Use Additional: D89.44 Hereditary alpha tryptasemia ("allergy status, other than to drugs and biological substances (Z91.0-)")
Code Also: Z87.892 Personal history of anaphylaxis ("allergy status, other than to drugs and biological substances (Z91.0-)")
Type 2 Excludes: Z88 Allergy status to drugs, medicaments and biological substances ("Allergy status, other than to drugs and biological substances (Z91.0-)")
Diagnosis Index entries for Z91.0120
Allergy, allergic (reaction) (to) › food (any) (ingested) NEC › status (without reaction) › eggs
History › personal (of) › allergy (to) › food › eggs