ICD-10 Code D59.11 – Warm autoimmune hemolytic anemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D59.11 – Warm autoimmune hemolytic anemia
What it is
D59.11 identifies warm autoimmune hemolytic anemia, a condition where the immune system destroys red blood cells at normal body temperature. Use this code when the record clearly documents warm autoimmune hemolysis.
Clinical signs
Typical findings include anemia with evidence of hemolysis, such as jaundice, fatigue, or dark urine. Clinical features vary; refer to documentation for the specific autoimmune hemolytic pattern.
When to use this code
Use D59.11 when the provider diagnoses warm autoimmune hemolytic anemia, including cases described as warm AIHA or warm antibody hemolysis. Apply it when documentation supports an autoimmune cause rather than another hemolytic disorder. Check documentation if the type of hemolysis is not stated.
Do not use for
Do not use this code for cold autoimmune hemolytic anemia, unspecified hemolytic anemia, or nonautoimmune hemolysis. If the chart only says hemolytic anemia without a warm autoimmune cause, check documentation.
Coding tip
Code the documented hemolysis type exactly; warm and cold autoimmune hemolytic anemia are not interchangeable.