Z91.13

Z91.13: Patient's unintentional underdosing of medication regimen

Non-billable headerICD-10-CM

Z91.13 is a non-billable header ICD-10-CM code for patient's unintentional underdosing of medication regimen. It cannot be billed on its own: choose one of the more specific child codes below.

Code first

The underlying condition must be sequenced before this code.

underdosing of medication (T36-T50) with fifth or sixth character 6

Excludes2 inherited from the categories above Z91.13

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

Written on Z91.1: Patient's noncompliance with medical treatment and regimen

caregiver noncompliance with patient's medical treatment and regimen (Z91.A-)

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 Z91.13

2 child codes. Green means billable.