2026 ICD-10-CM Diagnosis Code Z91.148Patient's other noncompliance with medication regimen for other reason

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z91

ICD-10-CM Z91.148
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z91.148 is a billable ICD-10-CM diagnosis code for Patient's other noncompliance with medication regimen for other reason. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.

Code Identity

ICD-10-CM Code
Z91.148
Billable Status
Yes — Valid for Submission
Code Describes
Patient's other noncompliance with medication regimen for other reason
Short Description
Patient's other noncompl with meds regimen for other reason
Parent Code
Z91.14
Patient's other noncompliance with medication regimen

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ91Personal risk factors, not elsewhere classified
This CodeZ91.148Patient's other noncompliance with medication regimen for other reason

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z91.148.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z91.148 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Deficit of medication supply
  • Difficulty managing medication due to special need
  • Difficulty obtaining medication
  • Difficulty obtaining refills
  • Difficulty self-administering non-parenteral medication
  • Difficulty self-administering parenteral medication
  • Difficulty taking medication
  • Discontinued medication without order
  • Does not follow recommended medication dosage
  • Does not follow recommended medication schedule
  • Does not manage medication
  • Does not obtain medication
  • Does not refill medications appropriately
  • Does not self-administer non-parenteral medication
  • Does not self-administer parenteral medication
  • Does not take medication
  • Does not take medication if feeling ill
  • Drug compliance poor
  • Drug therapy compliance finding
  • Drug treatment stopped patient ran out of medication
  • Drugs - partial non-compliance
  • Drugs - total non-compliance
  • Finding relating to special educational needs
  • History of noncompliance with medication regimen
  • Impaired ability to manage medication regime
  • Inadequate system for taking medication
  • Ineffective medication administration routine at home
  • Intentional misuse of medication
  • Medication adherence variable
  • Medication non-adherence due to hearing impairment
  • Medication non-adherence due to intolerance
  • Medication non-adherence due to language barrier
  • Medication non-adherence due to psychosocial issues
  • Medication non-compliance due to excessive pill burden
  • Medication overuse
  • Medication spat out by patient
  • Medication taken at higher dose than recommended
  • Medication taken at lower dose than recommended
  • Misuse of medication
  • Mixes medication with alcohol
  • Noncompliance with antiretroviral medication regimen
  • Noncompliance with medication regimen
  • Noncompliance with medication regimen due to cognitive impairment
  • Noncompliance with medication regimen due to visual impairment
  • Patient alters dosing schedule for convenience
  • Patient does not renew prescription
  • Patient has difficulty administering medication
  • Patient has difficulty distinguishing between medications
  • Patient has difficulty preparing medication
  • Patient sequesters unused medication
  • Patient takes inappropriate over-the-counter medication
  • Patient takes non-prescribed prescription medication
  • Poor compliance with inhaler
  • Prescription not collected
  • Refuses to discontinue medication
  • Stops taking medication too soon
  • Takes medication less frequently than recommended
  • Takes medication more frequently than recommended
  • Taking medication without order
  • Unable to manage medication
  • Unable to obtain medication
  • Unable to self-administer medication
  • Unable to self-administer non-parenteral medication
  • Unable to self-administer parenteral medication
  • Unable to take medication
  • Unintentional misuse of medication
  • Uses less medication than prescribed

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Noncompliance
      • with
        • medication regimen NEC
    • Noncompliance
      • with
        • medication regimen NEC
          • underdosing

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC025
Other specified status
Default principal diagnosis: inpatient No · outpatient Yes

Code History & ChangesHistory

Replacement Z91.148 replaces the following previously assigned code(s):

  • Z91.14 - Patient's other noncompliance with medication regimen
FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z91.148Overview

Is Z91.148 (Patient's other noncompliance with medication regimen) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Patient's other noncompliance with medication regimen for other reason on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z91.148 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because Patient's other noncompliance with medication regimen for other reason describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z91.148 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for Patient's other noncompliance with medication regimen for other reason on inpatient claims.