Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

Internal Codes
  • 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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