ICD-10 D56.3
Billable / SpecificThalassemia minor
About ICD-10-CM D56.3
ICD-10-CM code D56.3 represents Thalassemia minor. This is a billable/specific code in the Blood and Blood-forming Organs chapter (block D56). The 2026 edition of ICD-10-CM D56.3 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under D56.3. Per CMS ICD-10-CM Tabular 2026.
- Alpha thalassemia minor
- Alpha thalassemia silent carrier
- Alpha thalassemia trait
- Beta thalassemia minor
- Beta thalassemia trait
- Delta-beta thalassemia minor
- Delta-beta thalassemia trait
- Thalassemia trait NOS
Type 1 Excludes
Pure excludes, these codes can never be coded together with D56.3. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- alpha thalassemia (D56.0)
- beta thalassemia (D56.1)
- delta-beta thalassemia (D56.2)
- hemoglobin E-beta thalassemia (D56.5)
- sickle-cell trait (D57.3)
Medicare LCD Coverage for D56.3
Local Coverage Determinations (LCDs) from CMS MACs that list D56.3 as a covered diagnosis.
Showing top 10 of 219 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing D56.3.
1 Cigna
5 Medicare
Convert D56.3 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| D56.3 | 28246 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To D56.3
Other codes in section D55-D59 (Hemolytic anemias).
ICD-10 D56.3, Billing FAQ
Is ICD-10 code D56.3 billable? +
Yes, D56.3 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to D56.3? +
ICD-10 D56.3 includes: Alpha thalassemia minor; Alpha thalassemia silent carrier; Alpha thalassemia trait, and 5 more clinical synonyms.
What codes are Type 1 Excludes for D56.3? +
Type 1 Excludes (never code together with D56.3): alpha thalassemia (D56.0); beta thalassemia (D56.1); delta-beta thalassemia (D56.2)
What CPT codes are commonly billed with D56.3? +
Procedures frequently paired with D56.3 include: J2791, J2792.
What ICD-9 codes does D56.3 map to? +
Per CMS GEMs, D56.3 maps to ICD-9 codes: 28246. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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