D51.3 Other dietary vitamin B12 deficiency anemia

The ICD-10-CM code for Other dietary vitamin B12 deficiency anemia is D51.3 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

D50-D53: Nutritional anemias (D50-D53)

Category D51

7 codes (6 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to D51.3:

• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › vegan
• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › due to (in) (with) › dietary vitamin B12 deficiency
• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › combined system disease NEC › due to dietary vitamin B12 deficiency
• Degeneration, degenerative › combined (spinal cord) (subacute) › with anemia (pernicious) › due to dietary vitamin B12 deficiency
• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › deficiency › vitamin B12 NOS › dietary
• Neuropathy, neuropathic › vitamin B12 › with anemia (pernicious) › due to dietary deficiency
• Polyneuropathy (peripheral) › in (due to) › vitamin B12 deficiency › with anemia (pernicious) › due to dietary deficiency

Inclusion Terms

• Vegan anemia

U.S. Hospital Utilization

• An estimated 3,455 U.S. inpatient stays in 2023 included D51.3 among the documented diagnoses.
• 125 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 3 TOC entry

3. Chapter 3: Disease of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) ............................................................................................. 39

Reserved for future guideline expansion

Reserved for future guideline expansion ...................................................................................... 39

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)