ICD-10 Code C95.9 – Leukemia, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C95.9 – Leukemia, unspecified
What it is
C95.9 identifies leukemia when the record does not specify the type or lineage. Use it for a documented leukemia diagnosis without enough detail to assign a more specific code.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings may include fatigue, infections, bruising, bleeding, anemia, or abnormal blood counts, but the exact presentation depends on the leukemia type.
When to use this code
Use C95.9 when the clinician documents leukemia but does not name acute, chronic, lymphoid, myeloid, or another subtype. It is also appropriate when the available note, pathology report, or discharge summary lacks enough detail for a more specific code. You should code the highest level of specificity supported by the record.
Do not use for
Do not use this code if the leukemia type is documented, such as acute myeloid or chronic lymphocytic leukemia. Do not use it for history of leukemia or for screening without an active diagnosis.
Coding tip
Check the pathology, oncology, and discharge documentation first; if a subtype is stated anywhere in the record, code that specific leukemia instead of C95.9.