2B80.21

ICD-11 MMS 2026-01

Neuroendocrine neoplasms of small intestine, site unspecified

Description

Neoplasms that arise from the cells of neuroendocrine system lining the small intestine.

Coding note from above levels

For use of this category, reference should be made to the mortality coding rules and guidelines in the Reference Guide.

Index terms

  • Neuroendocrine neoplasms of small intestine, site unspecified
  • Neuroendocrine tumour of small intestine, site unspecified
  • NET - [neuroendocrine tumour] of small intestine
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  • small intestinal neuroendocrine tumour
  • Neuroendocrine tumour of small intestine, G1
  • Neuroendocrine tumour of small intestine, G2
  • Neuroendocrine carcinoma of small intestine, site unspecified
  • NEC - [neuroendocrine carcinoma] of small intestine
  • Large cell neuroendocrine carcinoma of small intestine
  • Small cell neuroendocrine carcinoma of small intestine

Exclusions from above levels

  • http://id.who.int/icd/entity/1965082709 – Malignant mesenchymal neoplasms
  • http://id.who.int/icd/entity/111033337 – Malignant neoplasm metastasis in digestive system
  • http://id.who.int/icd/entity/794095161 – Malignant neoplasms of lip, oral cavity or pharynx
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  • http://id.who.int/icd/entity/879154182 – Neoplasms of central nervous system or related structures
  • http://id.who.int/icd/entity/944754984 – Neoplasms of haematopoietic or lymphoid tissues

Sibling codes

  • 2B80.20 – Adenocarcinoma of small intestine, site unspecified
  • 2B80.2Y – Other specified malignant neoplasms of small intestine, site unspecified

Foundation entity

Neuroendocrine neoplasms of small intestine, site unspecified – http://id.who.int/icd/entity/1469325809

Allowed postcoordination axes

Part of: 2B80.2: Malignant neoplasms of small intestine, site unspecified › 2B80: Malignant neoplasms of small intestine › 02: Neoplasms