D56.9 Thalassemia, unspecified
The ICD-10-CM code for Thalassemia, unspecified is D56.9 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- D55-D59: Hemolytic anemias (D55-D59)
- Category D56
- 9 codes (8 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to D56.9:
- Thalassemia (anemia) (disease)
- Leptocytosis, hereditary
- Rietti-Greppi-Micheli anemia
- Disease, diseased › high fetal gene or hemoglobin thalassemia
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › Rietti-Greppi-Micheli
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › thalassemia
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › Mediterranean (with other hemoglobinopathy)
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › microelliptopoikilocytic (Rietti-Greppi- Micheli)
Inclusion Terms
- Mediterranean anemia (with other hemoglobinopathy)
U.S. Hospital Utilization
- An estimated 8,955 U.S. inpatient stays in 2023 included D56.9 among the documented diagnoses.
- 80 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Chapter 3 TOC entry3. Chapter 3: Disease of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) ............................................................................................. 39
Reserved for future guideline expansionReserved for future guideline expansion ...................................................................................... 39
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026