Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

All Codes Billable Only

Internal Codes

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C94.3|
Mast cell leukemia
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 myelofibrosis
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 leukemias
C94.80|
Other specified leukemias not having achieved remission
C94.81|
Other specified leukemias, in remission
C94.82|
Other specified leukemias, in relapse
C95|
Leukemia of unspecified cell type
C95.0|
Acute leukemia of unspecified cell type
C95.00|
Acute leukemia of unspecified cell type not having achieved remission
C95.01|
Acute leukemia of unspecified cell type, in remission
C95.02|
Acute leukemia of unspecified cell type, in relapse
C95.1|
Chronic leukemia of unspecified cell type
C95.10|
Chronic leukemia of unspecified cell type not having achieved remission
C95.11|
Chronic leukemia of unspecified cell type, in remission
C95.12|
Chronic leukemia of unspecified cell type, in relapse
C95.9|
Leukemia, unspecified
C95.90|
Leukemia, unspecified not having achieved remission
C95.91|
Leukemia, unspecified, in remission
C95.92|
Leukemia, unspecified, in relapse
C96|
Other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissue
C96.0|
Multifocal and multisystemic (disseminated) Langerhans-cell histiocytosis
C96.2|
Malignant mast cell neoplasm
C96.20|
Malignant mast cell neoplasm, unspecified
C96.21|
Aggressive systemic mastocytosis
C96.22|
Mast cell sarcoma
C96.29|
Other malignant mast cell neoplasm
C96.4|
Sarcoma of dendritic cells (accessory cells)
C96.5|
Multifocal and unisystemic Langerhans-cell histiocytosis
C96.6|
Unifocal Langerhans-cell histiocytosis
C96.9|
Malignant neoplasm of lymphoid, hematopoietic and related tissue, unspecified
C96.A|
Histiocytic sarcoma
C96.Z|
Other specified malignant neoplasms of lymphoid, hematopoietic and related tissue
D00|
Carcinoma in situ of oral cavity, esophagus and stomach
D00.0|
Carcinoma in situ of lip, oral cavity and pharynx
D00.00|
Carcinoma in situ of oral cavity, unspecified site
D00.01|
Carcinoma in situ of labial mucosa and vermilion border
D00.02|
Carcinoma in situ of buccal mucosa
D00.03|
Carcinoma in situ of gingiva and edentulous alveolar ridge
D00.04|
Carcinoma in situ of soft palate
D00.05|
Carcinoma in situ of hard palate
D00.06|
Carcinoma in situ of floor of mouth
D00.07|
Carcinoma in situ of tongue
D00.08|
Carcinoma in situ of pharynx

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