Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

Internal Codes
  • C7B.1

    Secondary Merkel cell carcinoma

  • C7B.8

    Other secondary neuroendocrine tumors

  • C80

    Malignant neoplasm without specification of site

  • C80.0

    Disseminated malignant neoplasm, unspecified

  • C80.1

    Malignant (primary) neoplasm, unspecified

  • C80.2

    Malignant neoplasm associated with transplanted organ

  • C81

    Hodgkin lymphoma

  • C81.0

    Nodular lymphocyte predominant Hodgkin lymphoma

  • C81.00

    Nodular lymphocyte predominant Hodgkin lymphoma, unspecified site

  • C81.01

    Nodular lymphocyte predominant Hodgkin lymphoma, lymph nodes of head, face, and neck

  • C81.02

    Nodular lymphocyte predominant Hodgkin lymphoma, intrathoracic lymph nodes

  • C81.03

    Nodular lymphocyte predominant Hodgkin lymphoma, intra-abdominal lymph nodes

  • C81.04

    Nodular lymphocyte predominant Hodgkin lymphoma, lymph nodes of axilla and upper limb

  • C81.05

    Nodular lymphocyte predominant Hodgkin lymphoma, lymph nodes of inguinal region and lower limb

  • C81.06

    Nodular lymphocyte predominant Hodgkin lymphoma, intrapelvic lymph nodes

  • C81.07

    Nodular lymphocyte predominant Hodgkin lymphoma, spleen

  • C81.08

    Nodular lymphocyte predominant Hodgkin lymphoma, lymph nodes of multiple sites

  • C81.09

    Nodular lymphocyte predominant Hodgkin lymphoma, extranodal and solid organ sites

  • C81.0A

    Nodular lymphocyte predominant Hodgkin lymphoma, in remission

  • C81.1

    Nodular sclerosis Hodgkin lymphoma

  • C81.10

    Nodular sclerosis Hodgkin lymphoma, unspecified site

  • C81.11

    Nodular sclerosis Hodgkin lymphoma, lymph nodes of head, face, and neck

  • C81.12

    Nodular sclerosis Hodgkin lymphoma, intrathoracic lymph nodes

  • C81.13

    Nodular sclerosis Hodgkin lymphoma, intra-abdominal lymph nodes

  • C81.14

    Nodular sclerosis Hodgkin lymphoma, lymph nodes of axilla and upper limb

  • C81.15

    Nodular sclerosis Hodgkin lymphoma, lymph nodes of inguinal region and lower limb

  • C81.16

    Nodular sclerosis Hodgkin lymphoma, intrapelvic lymph nodes

  • C81.17

    Nodular sclerosis Hodgkin lymphoma, spleen

  • C81.18

    Nodular sclerosis Hodgkin lymphoma, lymph nodes of multiple sites

  • C81.19

    Nodular sclerosis Hodgkin lymphoma, extranodal and solid organ sites

  • C81.1A

    Nodular sclerosis Hodgkin lymphoma, in remission

  • C81.2

    Mixed cellularity Hodgkin lymphoma

  • C81.20

    Mixed cellularity Hodgkin lymphoma, unspecified site

  • C81.21

    Mixed cellularity Hodgkin lymphoma, lymph nodes of head, face, and neck

  • C81.22

    Mixed cellularity Hodgkin lymphoma, intrathoracic lymph nodes

  • C81.23

    Mixed cellularity Hodgkin lymphoma, intra-abdominal lymph nodes

  • C81.24

    Mixed cellularity Hodgkin lymphoma, lymph nodes of axilla and upper limb

  • C81.25

    Mixed cellularity Hodgkin lymphoma, lymph nodes of inguinal region and lower limb

  • C81.26

    Mixed cellularity Hodgkin lymphoma, intrapelvic lymph nodes

  • C81.27

    Mixed cellularity Hodgkin lymphoma, spleen

  • C81.28

    Mixed cellularity Hodgkin lymphoma, lymph nodes of multiple sites

  • C81.29

    Mixed cellularity Hodgkin lymphoma, extranodal and solid organ sites

  • C81.2A

    Mixed cellularity Hodgkin lymphoma, in remission

  • C81.3

    Lymphocyte depleted Hodgkin lymphoma

  • C81.30

    Lymphocyte depleted Hodgkin lymphoma, unspecified site

  • C81.31

    Lymphocyte depleted Hodgkin lymphoma, lymph nodes of head, face, and neck

  • C81.32

    Lymphocyte depleted Hodgkin lymphoma, intrathoracic lymph nodes

  • C81.33

    Lymphocyte depleted Hodgkin lymphoma, intra-abdominal lymph nodes

  • C81.34

    Lymphocyte depleted Hodgkin lymphoma, lymph nodes of axilla and upper limb

  • C81.35

    Lymphocyte depleted Hodgkin lymphoma, lymph nodes of inguinal region and lower limb

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