R71.8

Billable

ChapterR00–R99

Ranksubcategory

Official Description

Other abnormality of red blood cells

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).

Instructional Notes

Includes

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

General instructions are available for the parent sections:

View CH18 Notes View R70-R79 Notes View R71 Notes

Clinical Hierarchy

CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

R70-R79Abnormal findings on examination of blood, without diagnosis (R70-R79)

R71Abnormality of red blood cells

R71.8Other abnormality of red blood cells

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to R71.8:

categoryR71

Abnormality of red blood cells

View context instructions

blockR70-R79

Abnormal findings on examination of blood, without diagnosis (R70-R79)

View context instructions

chapterCH18

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to R71.8. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

6 raw paths

Abnormal, abnormality, abnormalities1 unique routes

red blood cell (s) (morphology) (volume)→R71.8

Anisocytosis1 unique routes

Direct index entry→R71.8

Findings, abnormal, inconclusive, without diagnosis3 unique routes

anisocytosis→R71.8

poikilocytosis→R71.8

red blood cell (count) (morphology) (sickling) (volume)→R71.8

Poikilocytosis1 unique routes

Direct index entry→R71.8