D64.3

HCC Category Mapping

What This Code Means

A group of anemias characterized by abnormal iron accumulation in red blood cells that are not caused by drugs, toxins, or genetic factors.

Coding Tips

• •This is a catch-all code for sideroblastic anemias not classified elsewhere
• •Ensure the anemia is not secondary to drugs, toxins, or congenital conditions before assigning this code

Clinical Significance

Other sideroblastic anemias captures sideroblastic anemia cases that do not fit into hereditary (D64.0), disease-related secondary (D64.1), or drug/toxin-related secondary (D64.2) categories. This includes idiopathic acquired sideroblastic anemia without meeting full criteria for myelodysplastic syndrome, pyridoxine-responsive sideroblastic anemia of unclear etiology, and sideroblastic anemia associated with mitochondrial disorders not otherwise classified. The common feature is impaired heme synthesis with ring sideroblast formation on bone marrow examination.

Documentation Requirements

• ✓Document bone marrow biopsy findings showing ring sideroblasts with percentage quantification.
• ✓Record the evaluation performed to exclude hereditary, drug-induced, and disease-related causes.
• ✓Include hemoglobin level, mean corpuscular volume, reticulocyte count, serum iron studies, and ferritin level.
• ✓Document any pyridoxine trial results to assess responsiveness.
• ✓Note whether myelodysplastic syndrome has been considered and excluded through cytogenetic analysis and morphological review.

Commonly Confused Codes