ICD-10 Code D53.1 – Other megaloblastic anemias, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D53.1 – Other megaloblastic anemias, not elsewhere classified
What it is
This code identifies megaloblastic anemia that does not fit a more specific category. It usually reflects impaired DNA synthesis causing large, immature red blood cells, but the exact cause is not otherwise classified.
Clinical signs
Clinical features vary; refer to documentation. Common findings in megaloblastic anemia include anemia-related fatigue, pallor, and laboratory evidence of macrocytosis with megaloblastic changes on evaluation.
When to use this code
Use D53.1 when the record documents megaloblastic anemia and the provider does not specify a more precise type, such as vitamin deficiency anemia or another named cause. It is appropriate when the diagnosis is clearly stated and the chart supports a nonclassified megaloblastic process. Check documentation if the cause is uncertain.
Do not use for
Do not use this code for anemia already linked to a specific deficiency or another named disorder. If the record names a definite cause, code that condition instead.
Coding tip
Look for the provider’s final diagnosis, not just abnormal blood counts, before assigning D53.1.