2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of Blood And Blood-Forming Organs 280-289 > Aplastic Anemia 284.* > 2006 ICD-9-CM Diagnosis 284.9 Aplastic anemia unspecified View the most recent version of ICD-9-CM 284.9 A condition in which the bone marrow is unable to produce blood cells. Anemia resulting from bone marrow failure (aplastic or hypoplastic bone marrow). The production of erythroblasts and red cells is markedly decreased, and it may be associated with decreased production of granulocytes (granulocytopenia) and platelets (thrombocytopenia) as well. Aplastic anemia may be idiopathic or secondary due to bone marrow damage by toxins, radiation, or immunologic factors. -- 2004 A form of anemia in which the bone marrow fails to produce adequate numbers of peripheral blood elements. A severe sometimes chronic anemia, usually macrocytic in type, that does not respond to ordinary antianemic therapy. 284.9 is a specific code that can be used to specify a diagnosis 284.9 contains 28 index entries View the ICD-9-CM Volume 1 284.* hierarchy Alternate Terminology Anemia: aplastic (idiopathic) NOS aregenerative hypoplastic NOS nonregenerative Medullary hypoplasia 284.9 Excludes refractory anemia (238.7)  Index entries containing 284.9: Absence (organ or part) (complete or partial) bone (congenital) NEC 756.9 marrow 284.9 acquired (secondary) 284.8 congenital hereditary idiopathic 284.9 erythrocyte 284.9 erythropoiesis 284.9 congenital red cell 284.9 acquired (secondary) 284.8 congenital hereditary idiopathic 284.9 Aleukia hemorrhagica 284.9 acquired (secondary) 284.8 congenital idiopathic 284.9 Anemia 285.9 aplastic 284.9 acquired (secondary) 284.8 congenital constitutional due to chronic systemic disease 284.8 drugs 284.8 infection 284.8 radiation 284.8 idiopathic 284.9 myxedema 244.9 of or complicating pregnancy 648.2 red cell (acquired) (with thymoma) 284.8 congenital pure specified type NEC 284.8 toxic (paralytic) 284.8 aregenerative 284.9 congenital Davidson's (refractory) 284.9 hypoplastic (idiopathic) 284.9 congenital familial of childhood nonregenerative 284.9 semiplastic 284.9 Aplasia - see also Agenesis bone marrow (myeloid) 284.9 acquired (secondary) 284.8 congenital idiopathic 284.9 Arrest, arrested bone marrow (see also Anemia, aplastic) 284.9 Davidson's anemia (refractory) 284.9 Failure, failed bone marrow (anemia) 284.9 acquired (secondary) 284.8 congenital idiopathic 284.9 Hypocythemia (progressive) 284.9 Hypoplasia, hypoplasis 759.89 bone NEC 756.9 marrow 284.9 acquired (secondary) 284.8 congenital idiopathic 284.9 medullary 284.9 Marrow (bone) arrest 284.9 Panmyelophthisis idiopathic 284.9