Z91.118 ICD-10-CM Code: Patient's noncompliance with dietary regimen for other reason
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Factors influencing health status and contact with health services (Z00-Z99) / Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
Z91.118
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePatient's noncompliance with dietary regimen for other reason
A patient is not following their prescribed diet for reasons other than those specifically listed, such as cultural preferences, lack of understanding, or personal choice.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
Basket needed
Code Book Path
Inclusion Terms
Official- Inability to comply with dietary regimen
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Z91.118 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Z91.118 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Z91.118 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Z91.118 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Z91.118 in this effective period.
Code Also
Official- , if applicable, food insecurity (Z59.4-)
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is Z91.118 an HCC code?
No. Z91.118 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Z91.118 is the ICD-10-CM diagnosis code for patient's noncompliance with dietary regimen for other reason. A patient is not following their prescribed diet for reasons other than those specifically listed, such as cultural preferences, lack of understanding, or personal choice. Z91.118 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering persons with potential health hazards related to family and personal history and certain conditions influencing health status (z77-z99).
Z91.118 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Use this code when the reason for dietary noncompliance doesn't fit into more specific categories like financial hardship.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Z91.118 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code when the reason for dietary noncompliance doesn't fit into more specific categories like financial hardship
- •Document the specific reason for noncompliance in the medical record to support accurate coding