All ICD10 Codes

Z91.1

Non-Billable
ChapterZ00–Z99
Ranksubcategory
Official Description

Patient's noncompliance with medical treatment and regimen

Use a more specific code (0 billable, 6 non-billable)
Z91.11Patient's noncompliance with dietary regimenhas subcodesZ91.12Patient's intentional underdosing of medication regimenhas subcodesZ91.13Patient's unintentional underdosing of medication regimenhas subcodesZ91.14Patient's other noncompliance with medication regimenhas subcodesZ91.15Patient's noncompliance with renal dialysishas subcodesZ91.19Patient's noncompliance with other medical treatment and regimenhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00-Z99).

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • caregiver noncompliance with patient's medical treatment and regimen (Z91.A-)
Code Also
  • , if applicable, to identify underdosing of specific drug (T36-T50 with final character 6)
General instructions are available for the parent sections:
View Z77-Z99 NotesView Z91 Notes

Clinical Hierarchy

BillableHas subcodes
CH21Factors influencing health status and contact with health services (Z00-Z99)
Z77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
Z91Personal risk factors, not elsewhere classified
Z91.1Patient's noncompliance with medical treatment and regimenNot billable
Z91.11Patient's noncompliance with dietary regimenSubcodes
Z91.12Patient's intentional underdosing of medication regimenSubcodes
Z91.13Patient's unintentional underdosing of medication regimenSubcodes
Z91.14Patient's other noncompliance with medication regimenSubcodes
Z91.15Patient's noncompliance with renal dialysisSubcodes
Z91.19Patient's noncompliance with other medical treatment and regimenSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Z91.1:

categoryZ91
Personal risk factors, not elsewhere classified
View context instructions
blockZ77-Z99
Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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