Monocytic leukemia (C93) ICD-10-CM
The C93 code range covers monocytic leukemia with 21 ICD-10-CM diagnosis codes. 15 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- monocytoid leukemia
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- personal history of leukemia Z85.6
Codes in the C93 Range 21 codes · 15 billable
- C93 Monocytic leukemiaNon-billable
- C93.0 Acute monoblastic/monocytic leukemiaNon-billable
- C93.00 Acute monoblastic/monocytic leukemia, not having achieved remission
- C93.01 Acute monoblastic/monocytic leukemia, in remission
- C93.02 Acute monoblastic/monocytic leukemia, in relapse
- C93.1 Chronic myelomonocytic leukemiaNon-billable
- C93.10 Chronic myelomonocytic leukemia not having achieved remission
- C93.11 Chronic myelomonocytic leukemia, in remission
- C93.12 Chronic myelomonocytic leukemia, in relapse
- C93.3 Juvenile myelomonocytic leukemiaNon-billable
- C93.30 Juvenile myelomonocytic leukemia, not having achieved remission
- C93.31 Juvenile myelomonocytic leukemia, in remission
- C93.32 Juvenile myelomonocytic leukemia, in relapse
- C93.9 Monocytic leukemia, unspecifiedNon-billable
- C93.90 Monocytic leukemia, unspecified, not having achieved remission
- C93.91 Monocytic leukemia, unspecified in remission
- C93.92 Monocytic leukemia, unspecified in relapse
- C93.Z Other monocytic leukemiaNon-billable
- C93.Z0 Other monocytic leukemia, not having achieved remission
- C93.Z1 Other monocytic leukemia, in remission
- C93.Z2 Other monocytic leukemia, in relapse
About the C93 Code Range
ICD-10 code C93 and its subcodes are specifically used to classify different forms of monocytic leukemia, a group of rare blood cancers affecting monocytes, a type of white blood cell. These codes distinguish between acute, chronic, juvenile, and unspecified types, as well as the disease’s status, such as remission or relapse.
The ICD-10 code for monocytic leukemia covers various detailed diagnoses. For example, C93.00 and C93.01 refer to “acute monoblastic/monocytic leukemia,” also known as acute monocytic leukemia, indicating whether the disease is active or in remission. Chronic forms like chronic myelomonocytic leukemia use codes C93.10 and C93.11, linked to myelodysplastic/myeloproliferative disorders. Juvenile types, identified by C93.30 series, address conditions seen in children, including “juvenile myelomonocytic leukemia.” Unspecified and other monocyte leukemias have distinct codes to pinpoint their stage and classification. These codes help healthcare providers and coders accurately document the leukemia subtype and treatment status, essential for patient care, research, and billing.
Questions About This Page
How many billable codes are in the C93 range?
Of the 21 codes in this range, 15 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the C93 range classify?
The range classifies monocytic leukemia. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
