{"code":"Z79.811","type":"code","title":"Long term (current) use of aromatase inhibitors","codeAlso":["any therapeutic drug level monitoring (Z51.81)","any follow-up examination (Z08-Z09)"],"includes":["long term (current) drug use for prophylactic purposes"],"modern_v":"official26","codeFirst":[", if applicable:","malignant neoplasm of breast (C50.-)","malignant neoplasm of prostate (C61)"],"excludes1":["hormone replacement therapy (Z79.890)"],"excludes2":["drug abuse and dependence (F11-F19)","drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["Z79","Z79.0","Z79.01","Z79.02","Z79.1","Z79.2","Z79.3","Z79.4","Z79.5","Z79.51","Z79.52","Z79.6","Z79.60","Z79.61","Z79.62","Z79.620","Z79.621","Z79.622","Z79.623","Z79.624","Z79.63","Z79.630","Z79.631","Z79.632","Z79.633","Z79.634","Z79.64","Z79.69","Z79.8","Z79.81","Z79.810","Z79.818","Z79.82","Z79.83","Z79.84","Z79.85","Z79.89","Z79.890","Z79.891","Z79.899"],"inclusionTerms":["Long term (current) use of anastrozole (Arimidex)","Long term (current) use of exemestane (Aromasin)","Long term (current) use of letrozole (Femara)"],"sibling_titles":{"code":"Z79.899","title":"Other long term (current) drug therapy","isBillable":true},"useAdditionalCode":["code, if applicable, to identify:","estrogen receptor positive status (Z17.0)","family history of breast cancer (Z80.3)","genetic susceptibility to malignant neoplasm (cancer) (Z15.0-)","personal history of breast cancer (Z85.3)","personal history of prostate cancer (Z85.46)","postmenopausal status (Z78.0)"],"clinicalDefinition":"Long term (current) use of aromatase inhibitors is a billable ICD-10-CM diagnosis code (Z79.811). Includes: long term (current) drug use for prophylactic purposes. Inclusion terms: Long term (current) use of anastrozole (Arimidex); Long term (current) use of exemestane (Aromasin); Long term (current) use of letrozole (Femara). Excludes1 (not coded here): hormone replacement therapy (Z79.890).","officialDefinition":"Long term (current) use of aromatase inhibitors is a billable ICD-10-CM diagnosis code (Z79.811). Includes: long term (current) drug use for prophylactic purposes. Inclusion terms: Long term (current) use of anastrozole (Arimidex); Long term (current) use of exemestane (Aromasin); Long term (current) use of letrozole (Femara). Excludes1 (not coded here): hormone replacement therapy (Z79.890). Excludes2 (not included here): drug abuse and dependence (F11-F19); drug use complicating pregnancy, childbirth, and the puerperium (O99.32-). Code first: , if applicable:; malignant neoplasm of breast (C50.-); malignant neoplasm of prostate (C61). Use additional code: code, if applicable, to identify:; estrogen receptor positive status (Z17.0); family history of breast cancer (Z80.3); genetic susceptibility to malignant neoplasm (cancer) (Z15.0-); personal history of breast cancer (Z85.3); personal history of prostate cancer (Z85.46); postmenopausal status (Z78.0). Code also: any therapeutic drug level monitoring (Z51.81); 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":"","noteProvenance":{"drug abuse and dependence (F11-F19)":"Z79","drug use complicating pregnancy, childbirth, and the puerperium (O99.32-)":"Z79","long term (current) drug use for prophylactic purposes":"Z79","hormone replacement therapy (Z79.890)":"Z79.81",", if applicable:":"Z79.81","malignant neoplasm of breast (C50.-)":"Z79.81","malignant neoplasm of prostate (C61)":"Z79.81","code, if applicable, to identify:":"Z79.81","estrogen receptor positive status (Z17.0)":"Z79.81","family history of breast cancer (Z80.3)":"Z79.81","genetic susceptibility to malignant neoplasm (cancer) (Z15.0-)":"Z79.81","personal history of breast cancer (Z85.3)":"Z79.81","personal history of prostate cancer (Z85.46)":"Z79.81","postmenopausal status (Z78.0)":"Z79.81"},"hcc":{"mapped":false,"model":"CMS-HCC V28","paymentYear":"2026","categories":[],"otherModels":[]}}