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ICD-10-CM 2027 diagnosis code

Z91.ACaregiver's noncompliance with patient's medical treatment and regimen

Not billable — use a more specific code

Z91.A is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.Short description: Carers noncompl with patient's medical treatment and regimen

Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Z91.A

Z91.A is the ICD-10-CM diagnosis code for Caregiver's noncompliance with patient's medical treatment and regimen. 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 6 subcodes must be used instead.

Within Z91 (personal risk factors, not elsewhere classified), Z91.A is specifically for Caregiver's noncompliance with patient's medical treatment and regimen. Related codes cover allergy status, other than to drugs and biological substances (Z91.0), patient's noncompliance with medical treatment and regimen (Z91.1), personal history of psychological trauma, not elsewhere classified (Z91.4), personal history of self-harm (Z91.5), other specified personal risk factors, not elsewhere classified (Z91.8) and personal risk factor of exposure to diethylstilbestrol (Z91.B).

To report this condition, pick the subcode that matches the documentation: Z91.A1 (regimen), Z91.A2 (regimen), Z91.A3 (regimen), Z91.A4 (regimen), Z91.A5 (dialysis) and Z91.A9 (regimen).

It was added in FY2023, effective October 1, 2022.

Specific codes under Z91.A

Notes that apply from higher levels

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

› 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.

Codes whose notes reference Z91.A

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
  • FY2023 (effective 10/1/2022): Added
  • No changes since FY2023.

Common questions about Z91.A

Is Z91.A billable?

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