R71.8 — Other abnormality of red blood cells
Is R71.8 billable?
Yes — R71.8 is billable for FY2027. R71.8 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. R71.8 may be submitted for encounters from October 1, 2026 through September 30, 2027.
R71.8 at a glance
| Code | R71.8 |
|---|---|
| Description | Other abnormality of red blood cells |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does R71.8 group to?
R71.8 sits in MDC 16 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 811Red Blood Cell Disorders with MCCmedical
- 812Red Blood Cell Disorders without MCCmedical
How is R71.8 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to R71.8. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Anisocytosis
- Poikilocytosis
- Abnormal, abnormality, abnormalities › red blood cell
- Findings, abnormal, inconclusive, without diagnosis › anisocytosis
- Findings, abnormal, inconclusive, without diagnosis › poikilocytosis
- Findings, abnormal, inconclusive, without diagnosis › red blood cell
Inclusion terms
Alternative wording in documentation that is classified to R71.8.
- Abnormal red-cell morphology NOS
- Abnormal red-cell volume NOS
- Anisocytosis
- Poikilocytosis
Excludes1 — never code together — inherited from R71
The conditions below can never be reported together with R71.8 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 18
The conditions below are not part of R71.8, but a patient may have both at the same time. When documentation supports it, R71.8 and the excluded code may both be reported.
Excludes2 — not included here — inherited from R70-R79
The conditions below are not part of R71.8, but a patient may have both at the same time. When documentation supports it, R71.8 and the excluded code may both be reported.
- 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)
How long has R71.8 existed?
R71.8 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.