D64.1 ICD-10-CM Code: Secondary sideroblastic anemia due to disease
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 811 — RED BLOOD CELL DISORDERS WITH MCC (MDC 16)
- MS-DRG 812 — RED BLOOD CELL DISORDERS WITHOUT MCC (MDC 16)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Risk Adjustment (CMS-HCC)
Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.
- HCC 109 — Acquired Hemolytic, Aplastic, and Sideroblastic Anemias
Other models: CMS-HCC V22 HCC 48 · RxHCC V08 HCC 96
Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for D64.1 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- refractory anemia (D46.-)
- refractory anemia with excess blasts in transformation RAEB T
Code First
Underlying conditions that must be sequenced before this code.
- underlying disease
Nearest Codes in This Family
Official ICD-10-CM classifications closest to D64.1 in its code family, with their registry titles.
- D64 — Other anemias
- D64.0 — Hereditary sideroblastic anemia
- D64.2 — Secondary sideroblastic anemia due to drugs and toxins
- D64.3 — Other sideroblastic anemias
- D64.4 — Congenital dyserythropoietic anemia
- D64.8 — Other specified anemias
- D64.81 — Anemia due to antineoplastic chemotherapy
- D64.89 — Other specified anemias
- D64.9 — Anemia, unspecified
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound), sideroblastic, secondary (due to), disease