2027 ICD-10-CM Diagnosis Code D56.2Delta-beta thalassemia
ICD-10-CM Codes›D50–D89›D55-D59›D56
- Billable — Valid for Submission
- Risk Adjusts — HCC 108
- Chronic Condition
D56.2 is a billable ICD-10-CM diagnosis code for delta-beta thalassemia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 791, 793, 811 through 812. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Hemolytic anemia.
For Medicare Advantage risk adjustment, D56.2 maps to CMS-HCC Category 108 (Sickle Cell Disorders, Except Sickle Cell Anemia (Hb-SS) and Thalassemia Beta Zero; Beta Thalassemia Major) under the V28 model, adding a risk factor of about 0.146 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
D56.2 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- ^A^gamma delta beta^0^ thalassemia
- Beta zero thalassemia
- Delta beta thalassemia
- Delta beta thalassemia trait
- Delta beta zero thalassemia
- Delta thalassemia
- Delta zero thalassemia
- Delta-beta-Lepore thalassemia
- Epsilon gamma delta beta thalassemia
- Epsilon gamma delta beta^0^ thalassemia
- Gamma delta beta thalassemia
- Heterozygous thalassemia
- Sickle cell-beta-thalassemia
- Sickle cell-delta beta^0^-thalassemia
- Sickle cell-thalassemia disease
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D56.2: its own notes plus those printed at D56 and Chapter 3. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Homozygous delta-beta thalassemia
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- autoimmune disease (systemic) NOS (M35.9)
- certain conditions originating in the perinatal period (P00-P96)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- human immunodeficiency virus [HIV] disease (B20)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name D56.2, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming D56.2: they are not reported together with it, unless the two conditions are unrelated.
- D56.1 Beta thalassemiadelta-beta thalassemia (D56.2)
- D56.3 Thalassemia minordelta-beta thalassemia (D56.2)
- D56.5 Hemoglobin E-beta thalassemiadelta-beta thalassemia (D56.2)
- Block P50-P61 Hemorrhagic and hematological disorders of newborn
Code First 1
These codes say to code first a condition named in the note, and D56.2 is one of the conditions named.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Delta-Beta Thalassemia
a form of beta thalassemia characterized by decreased or absent synthesis of both the delta- and beta-globin chains, which leads to a compensatory increase in fetal gamma-chain synthesis. this disorder results in a microcytic anemia that is clinically mild.Thalassemia
a group of hereditary hemolytic anemias in which there is decreased synthesis of one or more hemoglobin polypeptide chains. there are several genetic types with clinical pictures ranging from barely detectable hematologic abnormality to severe and fatal anemia.
Patient EducationClinical
Thalassemia
Thalassemias are inherited blood disorders. If you have one, your body makes fewer healthy red blood cells and less hemoglobin. Hemoglobin is a protein that carries oxygen to the body. That leads to anemia. Thalassemias occur most often among people of Italian, Greek, Middle Eastern, Southern Asian, and African descent.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D56.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D56.2Overview
What is the ICD-10 code for delta-beta thalassemia?
The ICD-10-CM code for delta-beta thalassemia is D56.2 (sometimes written as D562). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D56.2 (Thalassemia) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report delta-beta thalassemia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D56.2 group to?
When delta-beta thalassemia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 812, 811, with relative weights from 0.9237 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D56.2 be reported with D56.3?
Not as a rule. The Excludes1 note on D56.2 lists "delta-beta thalassemia minor (D56.3)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of D56.2?
Under the General Equivalence Mappings, delta-beta thalassemia converts to ICD-9-CM 282.45 (delta-beta thalassemia). The mapping is a direct match.
What HCC is D56.2?
D56.2 (delta-beta thalassemia) maps to CMS-HCC Category 108 (Sickle Cell Disorders, Except Sickle Cell Anemia (Hb-SS) and Thalassemia Beta Zero; Beta Thalassemia Major), commonly written as HCC 108, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 48 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. It does not map to any RxHCC in the Part D prescription drug model.
Does D56.2 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, D56.2 adds a risk adjustment factor of about 0.146 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.098 to 0.416 depending on the payment segment). A more severe related category (HCC 107) supersedes it when both are reported. See the full factor table on the HCC 108 category page.
