Z91.1

Patient's noncompliance with medical treatment and regimen

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027

SourceCMS ICD-10-CM order file

ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODE	DESCRIPTION	TYPE
Z91.11	Patient's noncompliance with dietary regimen	Category
Z91.110	Patient's noncompliance with dietary regimen due to financial hardship	Billable
Z91.118	Patient's noncompliance with dietary regimen for other reason	Billable
Z91.119	Patient's noncompliance with dietary regimen due to unspecified reason	Billable
Z91.12	Patient's intentional underdosing of medication regimen	Category
Z91.120	Patient's intentional underdosing of medication regimen due to financial hardship	Billable
Z91.128	Patient's intentional underdosing of medication regimen for other reason	Billable
Z91.13	Patient's unintentional underdosing of medication regimen	Category
Z91.130	Patient's unintentional underdosing of medication regimen due to age-related debility	Billable
Z91.138	Patient's unintentional underdosing of medication regimen for other reason	Billable
Z91.14	Patient's other noncompliance with medication regimen	Category
Z91.141	Patient's other noncompliance with medication regimen due to financial hardship	Billable
Z91.148	Patient's other noncompliance with medication regimen for other reason	Billable
Z91.15	Patient's noncompliance with renal dialysis	Category
Z91.151	Patient's noncompliance with renal dialysis due to financial hardship	Billable
Z91.158	Patient's noncompliance with renal dialysis for other reason	Billable
Z91.19	Patient's noncompliance with other medical treatment and regimen	Category
Z91.190	Patient's noncompliance with other medical treatment and regimen due to financial hardship	Billable
Z91.198	Patient's noncompliance with other medical treatment and regimen for other reason	Billable
Z91.199	Patient's noncompliance with other medical treatment and regimen due to unspecified reason	Billable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.