All ICD10 Codes

D51

Non-Billable
ChapterD50–D89
Rankcategory
Official Description

Vitamin B12 deficiency anemia

Use a more specific code (6 billable)
D51.0Vitamin B12 deficiency anemia due to intrinsic factor deficiencyD51.1Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuriaD51.2Transcobalamin II deficiencyD51.3Other dietary vitamin B12 deficiency anemiaD51.8Other vitamin B12 deficiency anemiasD51.9Vitamin B12 deficiency anemia, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 3: Diseases of the Blood and Blood-Forming Organs (D50-D89).

CH3 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • autoimmune disease (systemic) NOS (M35.9)
  • certain conditions originating in the perinatal period (P00-P96)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • human immunodeficiency virus [HIV] disease (B20)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • deficiency of other B group vitamins (E53-)

Clinical Hierarchy

BillableHas subcodes
CH3Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
D50-D53Nutritional anemias (D50-D53)
D51Vitamin B12 deficiency anemiaNot billable
D51.0Vitamin B12 deficiency anemia due to intrinsic factor deficiencyBillable
D51.1Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuriaBillable
D51.2Transcobalamin II deficiencyBillable
D51.3Other dietary vitamin B12 deficiency anemiaBillable
D51.8Other vitamin B12 deficiency anemiasBillable
D51.9Vitamin B12 deficiency anemia, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to D51:

chapterCH3
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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