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ICD-10-CM 2027

ICD-10 code for CMML leukemia

C93.1

Chronic myelomonocytic leukemia

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Leukemia, leukemic › CMML (-1) (-2) (with eosinophilia)”. Page updated September 29, 2026.

About coding CMML leukemia

The ICD-10-CM code for CMML leukemia is C93.1 (Chronic myelomonocytic leukemia).

Within C93 (monocytic leukemia), C93.1 is specifically for chronic myelomonocytic leukemia. Related codes cover acute monoblastic/monocytic leukemia (C93.0), juvenile myelomonocytic leukemia (C93.3), unspecified (C93.9) and other monocytic leukemia (C93.Z).

To report this condition, pick the subcode that matches the documentation: C93.10 (not having achieved remission), C93.11 (in remission) and C93.12 (in relapse).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about CMML leukemia ICD-10 codes

What is the ICD-10 code for CMML leukemia?

C93.1 — Chronic myelomonocytic leukemia (a header code; report a more specific subcode).

Is C93.1 billable?

No. C93.1 is a header code. Report one of its more specific subcodes instead.