Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

Internal Codes
  • C34.80|

    Malignant neoplasm of overlapping sites of unspecified bronchus and lung

  • C34.81|

    Malignant neoplasm of overlapping sites of right bronchus and lung

  • C34.82|

    Malignant neoplasm of overlapping sites of left bronchus and lung

  • C34.90|

    Malignant neoplasm of unspecified part of unspecified bronchus or lung

  • C34.91|

    Malignant neoplasm of unspecified part of right bronchus or lung

  • C34.92|

    Malignant neoplasm of unspecified part of left bronchus or lung

  • C37|

    Malignant neoplasm of thymus

  • C38.0|

    Malignant neoplasm of heart

  • C38.1|

    Malignant neoplasm of anterior mediastinum

  • C38.2|

    Malignant neoplasm of posterior mediastinum

  • C38.3|

    Malignant neoplasm of mediastinum, part unspecified

  • C38.4|

    Malignant neoplasm of pleura

  • C38.8|

    Malignant neoplasm of overlapping sites of heart, mediastinum and pleura

  • C39.0|

    Malignant neoplasm of upper respiratory tract, part unspecified

  • C39.9|

    Malignant neoplasm of lower respiratory tract, part unspecified

  • C40.00|

    Malignant neoplasm of scapula and long bones of unspecified upper limb

  • C40.01|

    Malignant neoplasm of scapula and long bones of right upper limb

  • C40.02|

    Malignant neoplasm of scapula and long bones of left upper limb

  • C40.10|

    Malignant neoplasm of short bones of unspecified upper limb

  • C40.11|

    Malignant neoplasm of short bones of right upper limb

  • C40.12|

    Malignant neoplasm of short bones of left upper limb

  • C40.20|

    Malignant neoplasm of long bones of unspecified lower limb

  • C40.21|

    Malignant neoplasm of long bones of right lower limb

  • C40.22|

    Malignant neoplasm of long bones of left lower limb

  • C40.30|

    Malignant neoplasm of short bones of unspecified lower limb

  • C40.31|

    Malignant neoplasm of short bones of right lower limb

  • C40.32|

    Malignant neoplasm of short bones of left lower limb

  • C40.80|

    Malignant neoplasm of overlapping sites of bone and articular cartilage of unspecified limb

  • C40.81|

    Malignant neoplasm of overlapping sites of bone and articular cartilage of right limb

  • C40.82|

    Malignant neoplasm of overlapping sites of bone and articular cartilage of left limb

  • C40.90|

    Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb

  • C40.91|

    Malignant neoplasm of unspecified bones and articular cartilage of right limb

  • C40.92|

    Malignant neoplasm of unspecified bones and articular cartilage of left limb

  • C41.0|

    Malignant neoplasm of bones of skull and face

  • C41.1|

    Malignant neoplasm of mandible

  • C41.2|

    Malignant neoplasm of vertebral column

  • C41.3|

    Malignant neoplasm of ribs, sternum and clavicle

  • C41.4|

    Malignant neoplasm of pelvic bones, sacrum and coccyx

  • C41.9|

    Malignant neoplasm of bone and articular cartilage, unspecified

  • C43.0|

    Malignant melanoma of lip

  • C43.10|

    Malignant melanoma of unspecified eyelid, including canthus

  • C43.111|

    Malignant melanoma of right upper eyelid, including canthus

  • C43.112|

    Malignant melanoma of right lower eyelid, including canthus

  • C43.121|

    Malignant melanoma of left upper eyelid, including canthus

  • C43.122|

    Malignant melanoma of left lower eyelid, including canthus

  • C43.20|

    Malignant melanoma of unspecified ear and external auricular canal

  • C43.21|

    Malignant melanoma of right ear and external auricular canal

  • C43.22|

    Malignant melanoma of left ear and external auricular canal

  • C43.30|

    Malignant melanoma of unspecified part of face

  • C43.31|

    Malignant melanoma of nose

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