D51 (Vitamin B12 deficiency anemia) is an umbrella ICD-10-CM medical diagnosis code in the Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism chapter. It identifies cases of vitamin b12 deficiency anemia for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

D51 — Vitamin B12 deficiency anemia

Chapter D50-D89: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

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Sub-codes under D51

D51.0Vitamin B12 defic anemia due to intrinsic factor deficiencyD51.1Vit B12 defic anemia d/t slctv vit B12 malabsorp w proteinD51.2Transcobalamin II deficiencyD51.3Other dietary vitamin B12 deficiency anemiaD51.8Other vitamin B12 deficiency anemiasD51.9Vitamin B12 deficiency anemia, unspecified

Common questions about D51 (Vitamin B12 deficiency anemia)

What does ICD-10 code D51 mean?
D51 is the ICD-10-CM 2025 code for Vitamin B12 deficiency anemia. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is D51 a billable diagnosis code?
D51 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under D51. Browse the sub-codes listed on this page.
Which ICD-10 chapter does D51 belong to?
D51 belongs to the chapter "Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism" (codes D50-D89). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Vitamin B12 deficiency anemia?
For a plain-language explanation of Vitamin B12 deficiency anemia, ask GoDavaii's Health AI - it explains medical conditions in 90+ languages, free, with no signup. Tap "Ask GoDavaii AI about Vitamin B12 deficiency anemia" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗