{"code":"C91.51","type":"code","title":"Adult T-cell lymphoma/leukemia (HTLV-1-associated), in remission","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["personal history of leukemia (Z85.6)"],"excludes2":["Kaposi's sarcoma of lymph nodes (C46.3)","secondary and unspecified neoplasm of lymph nodes (C77.-)","secondary neoplasm of bone marrow (C79.52)","secondary neoplasm of spleen (C78.89)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Adult T-cell lymphoma/leukemia (HTLV-1-associated), in remission is a billable ICD-10-CM diagnosis code (C91.51). Excludes1 (not coded here): personal history of leukemia (Z85.6). Excludes2 (not included here): Kaposi's sarcoma of lymph nodes (C46.3); secondary and unspecified neoplasm of lymph nodes (C77.-); secondary neoplasm of bone marrow (C79.52); secondary neoplasm of spleen (C78.89).","officialDefinition":"Adult T-cell lymphoma/leukemia (HTLV-1-associated), in remission is a billable ICD-10-CM diagnosis code (C91.51). Excludes1 (not coded here): personal history of leukemia (Z85.6). Excludes2 (not included here): Kaposi's sarcoma of lymph nodes (C46.3); secondary and unspecified neoplasm of lymph nodes (C77.-); secondary neoplasm of bone marrow (C79.52); secondary neoplasm of spleen (C78.89).","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":"","noteProvenance":{"personal history of leukemia (Z85.6)":"C91","Kaposi's sarcoma of lymph nodes (C46.3)":"C91","secondary and unspecified neoplasm of lymph nodes (C77.-)":"C91","secondary neoplasm of bone marrow (C79.52)":"C91","secondary neoplasm of spleen (C78.89)":"C91","Acute variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)":"C91.5","Chronic variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)":"C91.5","Lymphomatoid variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)":"C91.5","Smouldering variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)":"C91.5"},"hcc":{"mapped":true,"model":"CMS-HCC V28","paymentYear":"2026","categories":[{"hcc":"19","label":"Myelodysplastic Syndromes, Multiple Myeloma, and Other Cancers","family":"Neoplasm","suppresses":[{"hcc":"20","label":"Lung and Other Severe Cancers"},{"hcc":"21","label":"Lymphoma and Other Cancers"},{"hcc":"22","label":"Bladder, Colorectal, and Other Cancers"},{"hcc":"23","label":"Prostate, Breast, and Other Cancers and Tumors"}]}],"otherModels":[{"model":"CMS-HCC V22","hcc":"10"},{"model":"RxHCC V08","hcc":"19"}]}}