ICD-10 · PDGM grouping
D46 Myelodysplastic syndromes
All 11 codes in the D46 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
11
Can lead a claim
11
Cannot lead a claim
0
What CMS assigns to D46
All 11 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. None of the 11 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in D46
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| D46.0 | Refractory anemia without ring sideroblasts, so stated | Can lead a claim | K | None |
| D46.1 | Refractory anemia with ring sideroblasts | Can lead a claim | K | None |
| D46.2 Refractory anemia with excess of blasts [RAEB] | ||||
| D46.20 | Refractory anemia with excess of blasts, unspecified | Can lead a claim | K | None |
| D46.21 | Refractory anemia with excess of blasts 1 | Can lead a claim | K | None |
| D46.22 | Refractory anemia with excess of blasts 2 | Can lead a claim | K | None |
| D46.A | Refractory cytopenia with multilineage dysplasia | Can lead a claim | K | None |
| D46.B | Refractory cytopenia with multilineage dysplasia and ring sideroblastsCMS: Refract cytopenia w multilin dysplasia and ring sideroblasts | Can lead a claim | K | None |
| D46.C | Myelodysplastic syndrome with isolated del(5q) chromosomal abnormalityCMS: Myelodysplastic syndrome w isolated del(5q) chromsoml abnlt | Can lead a claim | K | None |
| D46.4 | Refractory anemia, unspecified | Can lead a claim | K | None |
| D46.Z | Other myelodysplastic syndromes | Can lead a claim | K | None |
| D46.9 | Myelodysplastic syndrome, unspecified | Can lead a claim | K | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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