2027 ICD-10-CM Diagnosis Code Z91.148Patient's other noncompliance with medication regimen for other reason
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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. 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
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z91.148.
Present on Admission (POA)Billing
Z91.148 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).
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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Z91.148: its own notes plus those printed at Z91.14, Z91.1, Z91, block Z77-Z99, and Chapter 21. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- caregiver noncompliance with patient's medical treatment and regimen (Z91.A-)
Code First
The underlying condition named in the note is sequenced before this code.
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
Notes
General instructions on how these codes are used.
- Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
- (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
- (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
medication regimen NEC Z91.148
underdosing See Also: Table of Drugs and Chemicals, categories T36-T50, with final character 6; Z91.148
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Code History & ChangesHistory
Replacement Z91.148 replaces the following previously assigned code(s):
- Z91.14 - Patient's other noncompliance with medication regimen
Questions About Z91.148Overview
What is the ICD-10 code for Patient's other noncompliance with medication regimen for other reason?
The ICD-10-CM code for Patient's other noncompliance with medication regimen for other reason is Z91.148 (sometimes written as Z91148). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
What MS-DRG does Z91.148 group to?
On inpatient claims, Patient's other noncompliance with medication regimen for other reason maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.
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. The code appears in the Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) range of the CMS exempt list.
