Abnormality of red blood cells
Notes: Drop (precipitous) in hemoglobin ; Drop in hematocrit ; Abnormal red-cell morphology NOS ; Abnormal red-cell volume NOS ; Anisocytosis ; Poikilocytosis ; anemias (D50-D64) ; anemia of premature infant (P61.2) ; benign (familial) polycythemia (D75.0) ; congenital anemias (P61.2-P61.4) ; newborn anemia due to isoimmunization (P55.-) ; polycythemia neonatorum (P61.1) ; polycythemia NOS (D75.1) ; polycythemia vera (D45) ; secondary polycythemia (D75.1)