{"code":"Z51.1","type":"code","title":"Encounter for antineoplastic chemotherapy and immunotherapy","codeAlso":["condition requiring care"],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["follow-up examination after treatment (Z08-Z09)"],"excludes2":["encounter for chemotherapy and immunotherapy for nonneoplastic condition - code to condition","follow-up examination for medical surveillance after treatment (Z08-Z09)"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"sibling_codes":["Z51.11","Z51.12"],"inclusionTerms":[],"sibling_titles":{"code":"Z51.12","title":"Encounter for antineoplastic immunotherapy","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Encounter for antineoplastic chemotherapy and immunotherapy is a non-billable ICD-10-CM category code (Z51.1). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): follow-up examination after treatment (Z08-Z09). Excludes2 (not included here): encounter for chemotherapy and immunotherapy for nonneoplastic condition - code to condition; follow-up examination for medical surveillance after treatment (Z08-Z09). Code also: condition requiring care.","officialDefinition":"Encounter for antineoplastic chemotherapy and immunotherapy is a non-billable ICD-10-CM category code (Z51.1). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): follow-up examination after treatment (Z08-Z09). Excludes2 (not included here): encounter for chemotherapy and immunotherapy for nonneoplastic condition - code to condition; follow-up examination for medical surveillance after treatment (Z08-Z09). Code also: condition requiring care.","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":""}