ICD-10-CM Diagnosis Code for Folic Acid Deficiency
The ICD-10-CM diagnosis code for folic acid (folate) deficiency is D52, which covers folate deficiency anemia and related conditions.
Clinical Context and Documentation
While the provided evidence focuses extensively on folic acid supplementation guidelines, treatment protocols, and prevention strategies rather than specific ICD-10-CM coding, the clinical documentation should reflect:
- Megaloblastic anemia due to folate deficiency - the primary manifestation of folic acid deficiency 1, 2
- Nutritional folate deficiency - when dietary intake is inadequate 1
- Drug-induced folate deficiency - when caused by medications such as anticonvulsants, sulfasalazine, or methotrexate 3
Key Clinical Considerations for Diagnosis
When to Suspect Folate Deficiency
Folate deficiency should be considered in patients with 2:
- Macrocytic anemia with megaloblastic changes
- Malabsorption conditions including post-bariatric surgery patients 1
- Poor dietary intake or malnutrition risk 1
- Drug interactions affecting folate metabolism 3
- Pregnancy or planning conception, particularly post-bariatric surgery 1
Critical Diagnostic Pitfall
Always exclude vitamin B12 deficiency before diagnosing isolated folate deficiency 3. Folate deficiency is frequently related to vitamin B12 deficiency because B12 plays an essential role in folate metabolism through conversion of inactive methyltetrahydrofolic acid to active tetrahydrofolic acid 1. Treating folate deficiency without addressing concurrent B12 deficiency can mask the hematological manifestations while allowing neurological complications to progress, potentially precipitating subacute combined degeneration of the spinal cord 3.
Laboratory Confirmation
Folate status should be assessed using 2: