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D51.9

✓ Billable

Vitamin B12 deficiency anemia, unspecified

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

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⚠️ Excludes2

inherited from D51

Rules from parent category D51: Vitamin B12 deficiency anemia

  • • deficiency of other B group vitamins (E53-)

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Code Information

CodeD51.9
BillableYes
ParentD51
CategoryDiseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
Excludes10 rule(s)
Excludes21 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)