D51.9 is the authoritative medical code for Vitamin B12 deficiency anemia, unspecified. This classification is used in medical billing and clinical recording to specify the clinical criteria for vitamin b12 deficiency anemia, unspecified (ICD-10-CM D51.9), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Vitamin B12 deficiency anemia, unspecified is a billable ICD-10-CM diagnosis code D51.9. Excludes2 (not included here): deficiency of other B group vitamins E53-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for D51.9 in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- deficiency of other B group vitamins E53-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can D51.9 be reported alongside related conditions?
Per Excludes2 instructions, D51.9 and the following may both be reported when both are present: deficiency of other B group vitamins (E53-).
Codes in This Family (6)
Official ICD-10-CM classifications in the same code family as D51.9, with their registry titles.
- D51 — Vitamin B12 deficiency anemia
- 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
- D51.2 — Transcobalamin II deficiency
- D51.3 — Other dietary vitamin B12 deficiency anemia
- D51.8 — Other vitamin B12 deficiency anemias
Indexed Clinical Terms (2)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound), deficiency, vitamin B12 NOS
- Degeneration, degenerative, combined (spinal cord) (subacute), in (due to), vitamin B12 deficiency, anemia
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code D47.9
Neoplasm of uncertain behavior of lymphoid, hematopoietic and related tissue, unspecified