| Term | Definition |
| Anemia | decrease in the number of erythrocytes (RBCs), the quantity of hemoglobin (Hgb), or the volume of packed red cells (Hct) in the blood. |
| categories 280 - 281 | the deficiency anemias |
| 280 | iron deficiency, most common, usually due to blood loss 280.0 |
| 285.1 | acute posthemorrhagic anemia, acute blood loss |
| 281 Other deficiency anemias | megaloblastic anemias, includes vitamin B 12, folic acid problem |
| 282 inherited, 283 acquired Hemolytic Anemias | Increased RBC destruction, bone marrow can't keep up |
| 282 hereditary anemia examples: | Thalassemias, Sickle Cell Trait / Disease |
| aplastic anemias | a lack of bone marrow production. |
| pancytopenia disease | RBCs, WBCs and platelets decreased |
| Other anemias 285 examples: | acute blood loss, sideroblastic anemia, end-stage renal disease. |
| 286.0 coagulation defect | Hemophilia A / Classic / factor VIII deficiency |
| 286.1 coagulation defect | Hemophilia B / Christmas / factor IX deficiency |
| 286.2 coagulation defect | Hemophilia C / autosomal recessive / factor XI |
| E934.2 | indicates drug responsible for bleeding, coumadin. Code also condition and associated hemorrhage. |
| 790.92 abnormal lab finding | Do not use. Prolonged bleeding time is expected with coumadin, heparin. |
| 287 Thrombocytopenia | Platelets fall below 100,000/mm. Primary/Idioathic or Secondary. |
| Idiopathic or ITP/Immune Thrombocytopenic Purpura 287.30-287.39 | autoimmune disorder, antibodies to one's own platelets. |
| 287.4 Secondary Thrombocytopenia is | a complication of other diseases: infections, lupus erythematosus, lymphocytic leukemia, sarcoidosis, carcinoma, chemo.. (use Ecode) |
| 288 Diseases of WBCs | Granular (neutrophils, eosinophils, basopils) and nongranular ( lymphocytes and monocytes) |
| Bandemia 288.66 | Excess number of immature WBCs while total WBC count is normal |
| 289 ..nec.. such as | Polycythemia, lymphadenitis, hypersplenism, congestive splenomegaly, methemoglobinemia, myelofibrosis |