R71.0 Precipitous drop in hematocrit

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Drop (precipitous) in hemoglobin
• Drop in hematocrit

Applies from R71 Abnormality of red blood cells

Excludes1 (never code together)

• 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)

MS-DRG index

Defines the logic of DRG(s) 811-812 in MDC 16.

Approximate ICD-9-CM (GEMs)

• 790.01 Precipitous drop in hematocrit

Diagnosis Index entries for R71.0

• Decrease (d) › hematocrit
• Decrease (d) › hemoglobin
• Drop (in) › hematocrit (precipitous)
• Drop (in) › hemoglobin
• Findings, abnormal, inconclusive, without diagnosis › hematocrit drop (precipitous)

Nearby codes

• R71 Abnormality of red blood cells
• R71.0 Precipitous drop in hematocrit (this code)
• R71.8 Other abnormality of red blood cells