D64.3 vs E83.1
D64.3 and E83.1 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on E83.1
sideroblastic anemia (D64.0-D64.3)
D64.3
Other sideroblastic anemias
Billable
- Chapter 3
- Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- Section
- D60-D64
Use when the record says
- Sideroblastic anemia NOS
- Pyridoxine-responsive sideroblastic anemia NEC
Indexed under
- Anemia › pyridoxine-responsive (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
- Anemia › sideroblastic (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
- Anemia › hypochromic › pyridoxine-responsive (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
- Anemia › sideroblastic › pyridoxine-responsive NEC (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
- Anemia › sideroblastic › specified type NEC (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
E83.1
Disorders of iron metabolism
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E70-E88
Indexed under
- Hemosiderosis › pulmonary, idiopathic (dietary)
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027