ICD-10 Code C95.02 – Acute leukemia of unspecified cell type, in relapse (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C95.02 – Acute leukemia of unspecified cell type, in relapse
What it is
This code identifies acute leukemia when the specific cell type is not documented and the disease has returned after a period of remission. Use it when the record clearly states relapse and does not name a more specific leukemia subtype.
Clinical signs
Clinical features vary; refer to documentation. Common findings in acute leukemia may include fatigue, infections, easy bruising, bleeding, or abnormal blood counts, but the diagnosis here depends on the documented relapse status.
When to use this code
Use C95.02 when the provider documents acute leukemia of unspecified cell type as recurrent or relapsed disease. This is appropriate for inpatient, outpatient, or problem-list documentation when no more specific leukemia category is available. Check documentation if the record only says “history of leukemia” or “suspected relapse.”
Do not use for
Do not use this code for leukemia in remission, for newly diagnosed acute leukemia, or when a specific leukemia type is documented. If the chart does not confirm relapse, check documentation.
Coding tip
Code the relapse only when the clinician explicitly states recurrent or relapsed acute leukemia and no more specific subtype is recorded.