ICD-10-CM 2027 diagnosis code
D64.4Congenital dyserythropoietic anemia
D64.4 is a valid, billable ICD-10-CM code for congenital dyserythropoietic anemia. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About D64.4
D64.4 is the ICD-10-CM diagnosis code for congenital dyserythropoietic anemia. It belongs to category D64 (other anemias), block D60-D64 (aplastic and other anemias and other bone marrow failure syndromes) and chapter 3 (diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within D64 (other anemias), D64.4 is specifically for congenital dyserythropoietic anemia. Related codes cover hereditary sideroblastic anemia (D64.0), secondary sideroblastic anemia due to disease (D64.1), secondary sideroblastic anemia due to drugs and toxins (D64.2), other sideroblastic anemias (D64.3), other specified anemias (D64.8) and anemia, unspecified (D64.9).
Don't report D64.4 together with the conditions in its Excludes1 note: Blackfan-Diamond syndrome (D61.01) and Di Guglielmo's disease (C94.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 811 (Red Blood Cell Disorders with MCC, relative weight 1.3988) and DRG 812 (Red Blood Cell Disorders without MCC, relative weight 0.9234), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 285.8 (other specified anemias).
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to D64.4.
› From D64 Other anemias
Broader instructions also apply from Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Alphabetic index entries
3 entriesTerms in the official ICD-10-CM index that lead to D64.4.
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › congenital › dyserythropoietic, dyshematopoietic
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › dyserythropoietic (congenital)
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › dyshematopoietic (congenital)
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 16 · Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders
ICD-9-CM equivalent
Converter →- 285.8Other specified anemiasapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about D64.4
Is D64.4 billable?
- Yes. D64.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D64.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D64.4 as a principal diagnosis.
Is D64.4 a CC or MCC?
- No. D64.4 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does D64.4 group to?
- D64.4 is used in the MS-DRG v44.0 logic for MS-DRG 811 (Red Blood Cell Disorders with MCC) and MS-DRG 812 (Red Blood Cell Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for D64.4?
- The CMS General Equivalence Mappings map D64.4 to ICD-9-CM 285.8.