R71.8

Other abnormality of red blood cells

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · R71.8
Synonyms

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

Inherited from R71Abnormality of red blood cells
Excludes 1

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)

Inherited from R70-R79Abnormal findings on examination of blood, without diagnosis
Excludes 2

abnormal findings on antenatal screening of mother (O28.-) abnormalities of lipids (E78.-) abnormalities of platelets and thrombocytes (D69.-) abnormalities of white blood cells classified elsewhere (D70-D72) coagulation hemorrhagic disorders (D65-D68) diagnostic abnormal findings classified elsewhere - see Alphabetical Index hemorrhagic and hematological disorders of newborn (P50-P61)

Inherited from chapter 18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Excludes 2

abnormal findings on antenatal screening of mother (O28.-) certain conditions originating in the perinatal period (P04-P96) signs and symptoms classified in the body system chapters signs and symptoms of breast (N63, N64.5)

Official Guidelines for R71.8

FY 2026 ›
I.C.18Chapter-specific guidanceChapter 18: Symptoms, signs, and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Subsections

Sections that reference R71.8

Sections whose FY 2026 text names R71.8, its R71 category, or a range containing it — the chapter guidance above is the authoritative source.

Find R71.8 in the alphabetic index

6 index paths lead to this code