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ICD-10-CM 2027 diagnosis code

Z91.04Nonmedicinal substance allergy status

Not billable — use a more specific code

Z91.04 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z91.04

Z91.04 is the ICD-10-CM diagnosis code for nonmedicinal substance allergy status. It belongs to category Z91 (personal risk factors, not elsewhere classified), block Z77-Z99 (persons with potential health hazards related to family and personal history and certain conditions influencing health status) and chapter 21 (factors influencing health status and contact with health services). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within Z91.0 (allergy status, other than to drugs and biological substances), Z91.04 is specifically for nonmedicinal substance allergy status. Related codes cover food allergy status (Z91.01), food additives allergy status (Z91.02), insect allergy status (Z91.03) and other allergy status, other than to drugs and biological substances (Z91.09).

To report this condition, pick the subcode that matches the documentation: Z91.040 (status), Z91.041 (status) and Z91.048 (status).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Z91.04

Notes that apply from higher levels

Instructions written at a parent level also apply to Z91.04.

› From Z91.0 Allergy status, other than to drugs and biological substances
Excludes2
  • Allergy status to drugs, medicaments, and biological substances (Z88.-)
› From Z91 Personal risk factors, not elsewhere classified
Excludes2
  • 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-)

Broader instructions also apply from Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status and Chapter 21: Factors influencing health status and contact with health services.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Z91.04

Is Z91.04 billable?

No. Z91.04 is a header code. Report one of its more specific subcodes instead.