Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

Internal Codes
  • C84.1|

    Sézary disease

  • C84.10|

    Sézary disease, unspecified site

  • C84.11|

    Sézary disease, lymph nodes of head, face, and neck

  • C84.12|

    Sézary disease, intrathoracic lymph nodes

  • C84.13|

    Sézary disease, intra-abdominal lymph nodes

  • C84.14|

    Sézary disease, lymph nodes of axilla and upper limb

  • C84.15|

    Sézary disease, lymph nodes of inguinal region and lower limb

  • C84.16|

    Sézary disease, intrapelvic lymph nodes

  • C84.17|

    Sézary disease, spleen

  • C84.18|

    Sézary disease, lymph nodes of multiple sites

  • C84.19|

    Sézary disease, extranodal and solid organ sites

  • C84.1A|

    Sézary disease, in remission

  • C84.4|

    Peripheral T-cell lymphoma, not elsewhere classified

  • C84.40|

    Peripheral T-cell lymphoma, not elsewhere classified, unspecified site

  • C84.41|

    Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of head, face, and neck

  • C84.42|

    Peripheral T-cell lymphoma, not elsewhere classified, intrathoracic lymph nodes

  • C84.43|

    Peripheral T-cell lymphoma, not elsewhere classified, intra-abdominal lymph nodes

  • C84.44|

    Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper limb

  • C84.45|

    Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of inguinal region and lower limb

  • C84.46|

    Peripheral T-cell lymphoma, not elsewhere classified, intrapelvic lymph nodes

  • C84.47|

    Peripheral T-cell lymphoma, not elsewhere classified, spleen

  • C84.48|

    Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of multiple sites

  • C84.49|

    Peripheral T-cell lymphoma, not elsewhere classified, extranodal and solid organ sites

  • C84.4A|

    Peripheral T-cell lymphoma, not elsewhere classified, in remission

  • C84.6|

    Anaplastic large cell lymphoma, ALK-positive

  • C84.60|

    Anaplastic large cell lymphoma, ALK-positive, unspecified site

  • C84.61|

    Anaplastic large cell lymphoma, ALK-positive, lymph nodes of head, face, and neck

  • C84.62|

    Anaplastic large cell lymphoma, ALK-positive, intrathoracic lymph nodes

  • C84.63|

    Anaplastic large cell lymphoma, ALK-positive, intra-abdominal lymph nodes

  • C84.64|

    Anaplastic large cell lymphoma, ALK-positive, lymph nodes of axilla and upper limb

  • C84.65|

    Anaplastic large cell lymphoma, ALK-positive, lymph nodes of inguinal region and lower limb

  • C84.66|

    Anaplastic large cell lymphoma, ALK-positive, intrapelvic lymph nodes

  • C84.67|

    Anaplastic large cell lymphoma, ALK-positive, spleen

  • C84.68|

    Anaplastic large cell lymphoma, ALK-positive, lymph nodes of multiple sites

  • C84.69|

    Anaplastic large cell lymphoma, ALK-positive, extranodal and solid organ sites

  • C84.6A|

    Anaplastic large cell lymphoma, ALK-positive, in remission

  • C84.7|

    Anaplastic large cell lymphoma, ALK-negative

  • C84.70|

    Anaplastic large cell lymphoma, ALK-negative, unspecified site

  • C84.71|

    Anaplastic large cell lymphoma, ALK-negative, lymph nodes of head, face, and neck

  • C84.72|

    Anaplastic large cell lymphoma, ALK-negative, intrathoracic lymph nodes

  • C84.73|

    Anaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes

  • C84.74|

    Anaplastic large cell lymphoma, ALK-negative, lymph nodes of axilla and upper limb

  • C84.75|

    Anaplastic large cell lymphoma, ALK-negative, lymph nodes of inguinal region and lower limb

  • C84.76|

    Anaplastic large cell lymphoma, ALK-negative, intrapelvic lymph nodes

  • C84.77|

    Anaplastic large cell lymphoma, ALK-negative, spleen

  • C84.78|

    Anaplastic large cell lymphoma, ALK-negative, lymph nodes of multiple sites

  • C84.79|

    Anaplastic large cell lymphoma, ALK-negative, extranodal and solid organ sites

  • C84.7A|

    Anaplastic large cell lymphoma, ALK-negative, breast

  • C84.7B|

    Anaplastic large cell lymphoma, ALK-negative, in remission

  • C84.9|

    Mature T/NK-cell lymphomas, unspecified

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