D51.9Billable

Vitamin B12 deficiency anemia, unspecified

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

D51Vitamin B12 deficiency anemiaD51.0Vitamin 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 anemiasYes

Frequently asked questions

What is ICD-10 code D51.9?

D51.9 is an ICD-10-CM diagnosis code for Vitamin B12 deficiency anemia, unspecified.

Is D51.9 a billable code?

Yes. D51.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is D51.9 in?

D51.9 falls under Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.

When did D51.9 become effective?

D51.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to D51.9?

D51.9 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.