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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of Blood And Blood-Forming Organs 280-289 > Aplastic Anemia And Other Bone Marrow Failure Syndromes 284.* > 2007 ICD-9-CM Diagnosis 284.9 Aplastic anemia unspecified  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 284.9 can be accessed here. A condition in which the bone marrow is unable to produce blood cells. 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. 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 284.9 is a specific code that can be used to specify a diagnosis 284.9 contains 27 index entries View the ICD-9-CM Volume 1 284.* hierarchy 284.9 also known as: Anemia: aplastic (idiopathic) NOS aregenerative hypoplastic NOS nonregenerative Medullary hypoplasia 284.9 excludes: refractory anemia (238.72) 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 284.09 hereditary 284.09 idiopathic 284.9 erythrocyte 284.9 erythropoiesis 284.9 congenital 284.01 red cell 284.9 acquired (secondary) 284.8 congenital 284.01 hereditary 284.01 idiopathic 284.9 Aleukia hemorrhagica 284.9 acquired (secondary) 284.8 congenital 284.09 idiopathic 284.9 Anemia 285.9 aplastic 284.9 acquired (secondary) 284.8 congenital 284.01 constitutional 284.01 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 284.01 pure 284.01 specified type NEC 284.8 toxic (paralytic) 284.8 aregenerative 284.9 congenital 284.01 Davidson's (refractory) 284.9 hypoplastic (idiopathic) 284.9 congenital 284.01 familial 284.01 of childhood 284.09 nonregenerative 284.9 semiplastic 284.9 Aplasia - see also Agenesis bone marrow (myeloid) 284.9 acquired (secondary) 284.8 congenital 284.01 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 284.09 idiopathic 284.9 Hypocythemia (progressive) 284.9 Hypoplasia, hypoplasis 759.89 bone NEC 756.9 marrow 284.9 acquired (secondary) 284.8 congenital 284.09 idiopathic 284.9 medullary 284.9 Marrow (bone) arrest 284.9 Panmyelophthisis 284.2 idiopathic 284.9