D46 Myelodysplastic syndromes

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Myelodysplastic syndromes is D46 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
D37-D48: Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)
Category D46
13 codes (11 billable)
FY2026 Status
Stable since FY2024
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • drug-induced aplastic anemia (D61.1)
Use Additional Code
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Official Coding Guidelines

Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.a
Tx of secondary site (TOC entry)

b. Admission/Encounter for treatment of secondary site .......................................................... 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

D46.0 Refractory anemia without ring sideroblasts, so stated D46.1 Refractory anemia with ring sideroblasts D46.2 Refractory anemia with excess of blasts [RAEB] D46.20 Refractory anemia with excess of blasts, unspecified D46.21 Refractory anemia with excess of blasts 1 D46.22 Refractory anemia with excess of blasts 2 D46.4 Refractory anemia, unspecified D46.9 Myelodysplastic syndrome, unspecified D46.A Refractory cytopenia with multilineage dysplasia D46.B Refractory cytopenia with multilineage dysplasia and ring sideroblasts D46.C Myelodysplastic syndrome with isolated del(5q) chromosomal abnormality D46.Z Other myelodysplastic syndromes

Related Codes in D46

D46.0 Refractory anemia without ring sideroblasts, so stated D46.1 Refractory anemia with ring sideroblasts D46.2 Refractory anemia with excess of blasts [RAEB] D46.20 Refractory anemia with excess of blasts, unspecified D46.21 Refractory anemia with excess of blasts 1 D46.22 Refractory anemia with excess of blasts 2 D46.4 Refractory anemia, unspecified D46.9 Myelodysplastic syndrome, unspecified D46.A Refractory cytopenia with multilineage dysplasia D46.B Refractory cytopenia with multilineage dysplasia and ring sideroblasts D46.C Myelodysplastic syndrome with isolated del(5q) chromosomal abnormality D46.Z Other myelodysplastic syndromes
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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