2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Neoplasms 140-239 > Malignant Neoplasm Of Lymphatic And Hematopoietic Tissue 200-208 > 2006 ICD-9-CM Diagnosis 204 Lymphoid leukemia View the most recent version of ICD-9-CM 204 Leukemia associated with hyperplasia and overactivity of the lymphoid tissue. There are increased numbers of circulating malignant lymphocytes and lymphoblasts. A malignant lymphocytic neoplasm of B-cell or T-cell lineage involving primarily the bone marrow and the peripheral blood. This category includes precursor or acute lymphoblastic leukemias and chronic leukemias. --2003 204 is a non-specific code that cannot be used to specify a diagnosis 204 Includes leukemia: lymphatic lymphoblastic lymphocytic lymphogenous