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R71

Abnormality of red blood cells

• 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)

R71.0

Precipitous drop in hematocrit

• Drop (precipitous) in hemoglobin
• Drop in hematocrit

R71.8

Other abnormality of red blood cells

• Abnormal red-cell morphology NOS
• Abnormal red-cell volume NOS
• Anisocytosis
• Poikilocytosis