{"code":"Z91.A2","type":"code","title":"Caregiver's intentional underdosing of patient's medication regimen","codeAlso":["any follow-up examination (Z08-Z09)"],"includes":[],"modern_v":"official26","codeFirst":["underdosing of medication (T36-T50) with fifth or sixth character 6"],"excludes1":[],"excludes2":["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-)","occupational exposure to risk factors (Z57.-)","personal history of physical injury and trauma (Z87.81, Z87.82-)"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"sibling_codes":["Z91.A20","Z91.A28"],"inclusionTerms":[],"sibling_titles":{"code":"Z91.A28","title":"Caregiver's intentional underdosing of medication regimen for other reason","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Caregiver's intentional underdosing of patient's medication regimen is a non-billable ICD-10-CM category code (Z91.A2). A more specific billable subcode must be selected for claims submission. Excludes2 (not included here): 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-); occupational exposure to risk factors (Z57.","officialDefinition":"Caregiver's intentional underdosing of patient's medication regimen is a non-billable ICD-10-CM category code (Z91.A2). A more specific billable subcode must be selected for claims submission. Excludes2 (not included here): 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-); occupational exposure to risk factors (Z57.-); personal history of physical injury and trauma (Z87.81, Z87.82-). Code first: underdosing of medication (T36-T50) with fifth or sixth character 6. Code also: any follow-up examination (Z08-Z09).","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}