D51
⚠ Non-billable (Header)Vitamin B12 deficiency anemia
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
⚠️ This is a category header code — not billable. Use a more specific child code below.
⚠️ Excludes2
directMay be coded together if both conditions coexist
- • deficiency of other B group vitamins (E53-)
Child Codes (6)
D51.0Vitamin B12 deficiency anemia due to intrinsic factor deficiencyD51.1Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuriaD51.2Transcobalamin II deficiencyD51.3Other dietary vitamin B12 deficiency anemiaD51.8Other vitamin B12 deficiency anemiasD51.9Vitamin B12 deficiency anemia, unspecified
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CodeD51
BillableNo — Header code
CategoryDiseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
Excludes10 rule(s)
Excludes21 note(s)
Child codes6
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)