D51 – Vitamin B12 deficiency anemia
ICD-10-CM 2027 diagnosis code · Nutritional anemias
ICD-10-CM code
D51
- Code
D51(claims format:D51)- Description
- Vitamin B12 deficiency anemia
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
- Block
- D50-D53 Nutritional anemias
Billable codes under D51
D51 is a header code and cannot be used on claims. Choose the most specific code:
- D51.0 – Vitamin B12 deficiency anemia due to intrinsic factor deficiencyBillable
- D51.1 – Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuriaBillable
- D51.2 – Transcobalamin II deficiencyBillable
- D51.3 – Other dietary vitamin B12 deficiency anemiaBillable
- D51.8 – Other vitamin B12 deficiency anemiasBillable
- D51.9 – Vitamin B12 deficiency anemia, unspecifiedBillable
Notes for D51
Excludes2 (not included here):
- deficiency of other B group vitamins (E53-)
Frequently asked questions
What is ICD-10 code D51?
D51 is the ICD-10-CM code for vitamin B12 deficiency anemia, in the block D50-D53 (Nutritional anemias).
Is D51 a billable code?
No. D51 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.