D51.9 – Vitamin B12 deficiency anemia, unspecified
ICD-10-CM 2027 diagnosis code · Nutritional anemias
ICD-10-CM code
D51.9
- Code
D51.9(claims format:D519)- Description
- Vitamin B12 deficiency anemia, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
- Block
- D50-D53 Nutritional anemias
- Parent codes
- D51
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
D51 – Vitamin B12 deficiency anemia
Excludes2 (not included here):
- deficiency of other B group vitamins (E53-)
Index terms for D51.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in D51
- D51.0 – Vitamin B12 deficiency anemia due to intrinsic factor deficiencyBillable
- D51.1 – Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuriaBillable
- D51.2 – Transcobalamin II deficiencyBillable
- D51.3 – Other dietary vitamin B12 deficiency anemiaBillable
- D51.8 – Other vitamin B12 deficiency anemiasBillable
Frequently asked questions
What is ICD-10 code D51.9?
D51.9 is the ICD-10-CM code for vitamin B12 deficiency anemia, unspecified, in the block D50-D53 (Nutritional anemias).
Is D51.9 a billable code?
Yes. D51.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does D51.9 belong to?
It belongs to category D51 – Vitamin B12 deficiency anemia.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.