Other leukemias of specified cell type (C94) ICD-10-CM
The C94 code range covers other leukemias of specified cell type with 22 ICD-10-CM diagnosis codes. 16 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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.
Codes in the C94 Range 22 codes · 16 billable
- C94 Other leukemias of specified cell typeNon-billable
- C94.0 Acute erythroid leukemiaNon-billable
- C94.00 Acute erythroid leukemia, not having achieved remission
- C94.01 Acute erythroid leukemia, in remission
- C94.02 Acute erythroid leukemia, in relapse
- C94.2 Acute megakaryoblastic leukemiaNon-billable
- C94.20 Acute megakaryoblastic leukemia not having achieved remission
- C94.21 Acute megakaryoblastic leukemia, in remission
- C94.22 Acute megakaryoblastic leukemia, in relapse
- C94.3 Mast cell leukemiaNon-billable
- C94.30 Mast cell leukemia not having achieved remission
- C94.31 Mast cell leukemia, in remission
- C94.32 Mast cell leukemia, in relapse
- C94.4 Acute panmyelosis with myelofibrosisNon-billable
- C94.40 Acute panmyelosis with myelofibrosis not having achieved remission
- C94.41 Acute panmyelosis with myelofibrosis, in remission
- C94.42 Acute panmyelosis with myelofibrosis, in relapse
- C94.6 Myelodysplastic disease, not elsewhere classified
- C94.8 Other specified leukemiasNon-billable
- C94.80 Other specified leukemias not having achieved remission
- C94.81 Other specified leukemias, in remission
- C94.82 Other specified leukemias, in relapse
About the C94 Code Range
The ICD-10 code section C94 categorizes "Other leukemias of specified cell type," used for coding various rare and specific leukemias that may not fit common classifications. This section includes conditions such as acute erythroid leukemia, acute megakaryoblastic leukemia, mast cell leukemia, acute panmyelosis with myelofibrosis, and other specified leukemias.
These codes are essential when documenting types of leukemia with unique cellular origins and behaviors. For example, C94.00 and related codes refer to acute erythroid leukemia, also known as erythroleukemia or "FAB M6," with distinctions for remission and relapse status. Similarly, C94.20 covers acute megakaryoblastic leukemia, sometimes called megakaryocytic leukemia, with specific subcodes indicating treatment response phases. C94.30 addresses mast cell leukemia, recognized by synonyms like malignant mastocytosis and systemic mast cell disease. The section also includes codes for acute panmyelosis with myelofibrosis and myelodysplastic diseases not elsewhere classified, which are linked to various hematological disorders. Additionally, C94.80 through C94.82 cover other specified leukemias, including mixed phenotype leukemias and aggressive NK-cell leukemias, with attention to remission and relapse.
Questions About This Page
How many billable codes are in the C94 range?
Of the 22 codes in this range, 16 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 C94 range classify?
The range classifies other leukemias of specified cell type. 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.
