Z91.118 Patient's noncompliance with dietary regimen for other reason

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Inability to comply with dietary regimen

Applies from Z91 Personal risk factors, not elsewhere classified

Excludes2 (not included here)

• 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-)

Applies from Z91.1 Patient's noncompliance with medical treatment and regimen

Excludes2 (not included here)

• 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)

Applies from Z91.11 Patient's noncompliance with dietary regimen

Code also

• , if applicable, food insecurity (Z59.4-)

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Diagnosis Index entries for Z91.118

• Inability to › comply with dietary regimen
• Noncompliance › with › dietary regimen › due to › specified reason NEC

Nearby codes

• Z91.048 Other nonmedicinal substance allergy status
• Z91.09 Other allergy status, other than to drugs and biological substances
• Z91.1 Patient's noncompliance with medical treatment and regimen
• Z91.11 Patient's noncompliance with dietary regimen
• Z91.110 Patient's noncompliance with dietary regimen due to financial hardship
• Z91.118 Patient's noncompliance with dietary regimen for other reason (this code)
• Z91.119 Patient's noncompliance with dietary regimen due to unspecified reason
• Z91.12 Patient's intentional underdosing of medication regimen
• Z91.120 Patient's intentional underdosing of medication regimen due to financial hardship
• Z91.128 Patient's intentional underdosing of medication regimen for other reason
• Z91.13 Patient's unintentional underdosing of medication regimen