Version 2024
Replaced Code

2024 ICD-10-CM Diagnosis Code Z91.A9

Caregiver's noncompliance with patient's other medical treatment and regimen

ICD-10-CM Code:
Z91.A9
ICD-10 Code for:
Carers noncompl with pt other medical treatment and regimen
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • 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)
      • Personal risk factors, not elsewhere classified
        (Z91)

Z91.A9 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of caregiver's noncompliance with patient's other medical treatment and regimen. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Carers noncompl with pt other medical treatment and regimen

Non-specific codes like Z91.A9 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for carers noncompl with pt other medical treatment and regimen:

  • Use Z91.A91 for Caregiver's noncompliance with patient's other medical treatment and regimen due to financial hardship - BILLABLE CODE

  • Use Z91.A98 for Caregiver's noncompliance with patient's other medical treatment and regimen for other reason - BILLABLE CODE

Clinical Classification

New 2024 ICD-10-CM Code

Z91.A9 is new to ICD-10-CM code set for the FY 2024, effective October 1, 2023. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2023. This is a new and revised code for the FY 2024 (October 1, 2023 - September 30, 2024).

Replaced Code

This code was replaced in the 2024 ICD-10-CM code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2023. This code was replaced for the FY 2024 (October 1, 2023 - September 30, 2024).


  • Z91.A91 - Carers noncompl w pt oth med trtmt & regimen d/t fin hrdshp
  • Z91.A98 - Carers noncompl w pt oth med trtmt and regimen for oth rsn

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Caregiver's nonadherence to patient's medical treatment

Replacement Code

Z91A9 replaces the following previously assigned ICD-10-CM code(s):

  • Z91.19 - Patient's noncompliance w oth medical treatment and regimen

Code History

  • FY 2024 - Code Added, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - Code Added, effective from 10/1/2022 through 9/30/2023