D46
ICD-10Non-billable categoryMyelodysplastic syndromes
Official ICD-10-CM descriptor (FY2026)
Myelodysplastic syndromes
D46 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- drug-induced aplastic anemia (D61.1)
Use additional code
Report an additional code to identify the associated condition.
- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
More specific codes under D46
- D46.0Refractory anemia without ring sideroblasts, so stated
- D46.1Refractory anemia with ring sideroblasts
- D46.2Refractory anemia with excess of blasts [RAEB]category
- D46.ARefractory cytopenia with multilineage dysplasia
- D46.BRefract cytopenia w multilin dysplasia and ring sideroblasts
- D46.CMyelodysplastic syndrome w isolated del(5q) chromsoml abnlt
- D46.4Refractory anemia, unspecified
- D46.ZOther myelodysplastic syndromes
- D46.9Myelodysplastic syndrome, unspecified
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.