D51Header code — not billable
Vitamin B12 deficiency anemia
- Chapter
- 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- Category
- D51
- Effective date
- October 1, 2026
Related codes in category D51
D51.0Vitamin B12 defic anemia due to intrinsic factor deficiencyYesD51.1Vit B12 defic anemia d/t slctv vit B12 malabsorp w proteinYesD51.2Transcobalamin II deficiencyYesD51.3Other dietary vitamin B12 deficiency anemiaYesD51.8Other vitamin B12 deficiency anemiasYesD51.9Vitamin B12 deficiency anemia, unspecifiedYes
Frequently asked questions
What is ICD-10 code D51?
D51 is an ICD-10-CM diagnosis code for Vitamin B12 deficiency anemia.
Is D51 a billable code?
No. D51 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is D51 in?
D51 falls under Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
When did D51 become effective?
D51 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to D51?
D51 belongs to category D51, which includes 6 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.