2019 ICD-10-CM Diagnosis Code Z91.138

Patient's unintentional underdosing of medication regimen for other reason

    2016 2017 2018 2019 Billable/Specific Code POA Exempt
  • Z91.138 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Patient's unintent undrdose of meds regimen for oth reason
  • The 2019 edition of ICD-10-CM Z91.138 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of Z91.138 - other international versions of ICD-10 Z91.138 may differ.
The following code(s) above Z91.138 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Z91.138:
  • Z00-Z99
    2019 ICD-10-CM Range Z00-Z99

    Factors influencing health status and contact with health services

    Note
    • 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.
    Factors influencing health status and contact with health services
  • Z77-Z99
    2019 ICD-10-CM Range Z77-Z99

    Persons with potential health hazards related to family and personal history and certain conditions influencing health status

    Code Also
    • any follow-up examination (Z08-Z09)
    Persons with potential health hazards related to family and personal history and certain conditions influencing health status
  • Z91
    ICD-10-CM Diagnosis Code Z91

    Personal risk factors, not elsewhere classified

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • 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-)
    • personal history of physical injury and trauma (Z87.81, Z87.82-)
    • occupational exposure to risk factors (Z57.-)
    Personal risk factors, not elsewhere classified
  • Z91.13
    ICD-10-CM Diagnosis Code Z91.13

    Patient's unintentional underdosing of medication regimen

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Code First
    • underdosing of medication (T36-T50) with fifth or sixth character 6
    Type 1 Excludes
    • adverse effect of prescribed drug taken as directed- code to adverse effect
    • poisoning (overdose) -code to poisoning
    Patient's unintentional underdosing of medication regimen
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • Z91.138 is considered exempt from POA reporting.
ICD-10-CM Z91.138 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 951 Other factors influencing health status

Convert Z91.138 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to Z91.138:
  • Noncompliance Z91.19
    ICD-10-CM Diagnosis Code Z91.19

    Patient's noncompliance with other medical treatment and regimen

      2016 2017 2018 2019 Billable/Specific Code POA Exempt
    Applicable To
    • Nonadherence to medical treatment
    • with
      • medication regimen NEC Z91.14
        ICD-10-CM Diagnosis Code Z91.14

        Patient's other noncompliance with medication regimen

          2016 2017 2018 2019 Billable/Specific Code POA Exempt
        Applicable To
        • Patient's underdosing of medication NOS
        • underdosing Z91.14
          - see also Table of Drugs and Chemicals, categories T36-T50, with final character 6
          ICD-10-CM Diagnosis Code Z91.14

          Patient's other noncompliance with medication regimen

            2016 2017 2018 2019 Billable/Specific Code POA Exempt
          Applicable To
          • Patient's underdosing of medication NOS
  • Underdosing Z91.14
    - see also Table of Drugs and Chemicals, categories T36-T50, with final character 6
    ICD-10-CM Diagnosis Code Z91.14

    Patient's other noncompliance with medication regimen

      2016 2017 2018 2019 Billable/Specific Code POA Exempt
    Applicable To
    • Patient's underdosing of medication NOS

ICD-10-CM Codes Adjacent To Z91.138
Z91.041 Radiographic dye allergy status
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
Z91.12 Patient's intentional underdosing of medication regimen
Z91.120 …… due to financial hardship
Z91.128 …… for other reason
Z91.13 Patient's unintentional underdosing of medication regimen
Z91.130 …… due to age-related debility
Z91.138 …… for other reason
Z91.14 Patient's other noncompliance with medication regimen
Z91.15 Patient's noncompliance with renal dialysis
Z91.19 Patient's noncompliance with other medical treatment and regimen
Z91.4 Personal history of psychological trauma, not elsewhere classified
Z91.41 Personal history of adult abuse
Z91.410 Personal history of adult physical and sexual abuse
Z91.411 Personal history of adult psychological abuse
Z91.412 Personal history of adult neglect
Z91.419 Personal history of unspecified adult abuse
Z91.42 Personal history of forced labor or sexual exploitation

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.