D51: Vitamin B12 deficiency anemia
Codes under D51 (Vitamin B12 deficiency anemia). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| D51.0 | Vitamin B12 deficiency anemia due to intrinsic factor deficiency | ✓ |
| D51.0 | Vitamin B12 deficiency anemia due to intrinsic factor deficiency | ✓ |
| D51.1 | Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuria | ✓ |
| D51.1 | Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuria | ✓ |
| D51.2 | Transcobalamin II deficiency | ✓ |
| D51.2 | Transcobalamin II deficiency | ✓ |
| D51.3 | Other dietary vitamin B12 deficiency anemia | ✓ |
| D51.3 | Other dietary vitamin B12 deficiency anemia | ✓ |
| D51.8 | Other vitamin B12 deficiency anemias | ✓ |
| D51.8 | Other vitamin B12 deficiency anemias | ✓ |
| D51.9 | Vitamin B12 deficiency anemia, unspecified | ✓ |
| D51.9 | Vitamin B12 deficiency anemia, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code D51?
D51 is an ICD-10-CM category covering Vitamin B12 deficiency anemia. It contains 12 more specific diagnosis codes, 12 of which are billable.
Is D51 a billable code?
No — D51 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example D51.0 — Vitamin B12 deficiency anemia due to intrinsic factor deficiency). 12 of the 12 codes under D51 are billable.
What codes fall under D51?
D51 includes D51.0, D51.0, D51.1, D51.1, D51.2, plus 7 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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