Alphabetic Index FY2027

D51

Vitamin B12 deficiency anemia

FY2027Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism/D50–D53 Nutritional anemias

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

D51 is a non-billable ICD-10-CM code category for vitamin B12 deficiency anemia. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are 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 and 2 more. Its coding notes include 10 Excludes2 entries.

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
  • deficiency of other B group vitamins (E53-)
Also from chapter/block level (9 notes)
Inherited from Chapter 3 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
  • 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)

More specific codes under D51 6