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Z91.A9

Z91.A9: Caregiver's noncompliance with patient's other medical treatment and regimen

Non-billable headerICD-10-CM

Z91.A9 is a non-billable header ICD-10-CM code for caregiver's noncompliance with patient's other medical treatment and regimen. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Caregiver's nonadherence to patient's medical treatment

Excludes2 inherited from the categories above Z91.A9

Not part of this code, but both may be coded when both are present.

Written on Z91: Personal risk factors, not elsewhere classified

  • 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-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead Z91.A9

2 child codes. Green means billable.

Other codes under Z91.A

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.