• 209.0
  Malignant carcinoid tumors of the small intestine
• 209.00
  Malignant carcinoid tumor of the small intestine, unspecified portion
• 209.01
  Malignant carcinoid tumor of the duodenum
• 209.02
  Malignant carcinoid tumor of the jejunum
• 209.03
  Malignant carcinoid tumor of the ileum
• 209.1
  Malignant carcinoid tumors of the appendix, large intestine, and rectum
• 209.10
  Malignant carcinoid tumor of the large intestine, unspecified portion
• 209.11
  Malignant carcinoid tumor of the appendix
• 209.12
  Malignant carcinoid tumor of the cecum
• 209.13
  Malignant carcinoid tumor of the ascending colon
• 209.14
  Malignant carcinoid tumor of the transverse colon
• 209.15
  Malignant carcinoid tumor of the descending colon
• 209.16
  Malignant carcinoid tumor of the sigmoid colon
• 209.17
  Malignant carcinoid tumor of the rectum
• 209.2
  Malignant carcinoid tumors of other and unspecified sites
• 209.20
  Malignant carcinoid tumor of unknown primary site
• 209.21
  Malignant carcinoid tumor of the bronchus and lung
• 209.22
  Malignant carcinoid tumor of the thymus
• 209.23
  Malignant carcinoid tumor of the stomach
• 209.24
  Malignant carcinoid tumor of the kidney
• 209.25
  Malignant carcinoid tumor of the foregut NOS
• 209.26
  Malignant carcinoid tumor of the midgut NOS
• 209.27
  Malignant carcinoid tumor of the hindgut NOS
• 209.29
  Malignant carcinoid tumors of other sites
• 209.3
  Malignant poorly differentiated neuroendocrine tumors
• 209.30
  Malignant poorly differentiated neuroendocrine carcinoma, any site
• 209.31
  Merkel cell carcinoma of the face
• 209.32
  Merkel cell carcinoma of the scalp and neck
• 209.33
  Merkel cell carcinoma of the upper limb
• 209.34
  Merkel cell carcinoma of the lower limb
• 209.35
  Merkel cell carcinoma of the trunk
• 209.36
  Merkel cell carcinoma of other sites
• 209.4
  Benign carcinoid tumors of the small intestine
• 209.40
  Benign carcinoid tumor of the small intestine, unspecified portion
• 209.41
  Benign carcinoid tumor of the duodenum
• 209.42
  Benign carcinoid tumor of the jejunum
• 209.43
  Benign carcinoid tumor of the ileum
• 209.5
  Benign carcinoid tumors of the appendix, large intestine, and rectum
• 209.50
  Benign carcinoid tumor of the large intestine, unspecified portion
• 209.51
  Benign carcinoid tumor of the appendix
• 209.52
  Benign carcinoid tumor of the cecum
• 209.53
  Benign carcinoid tumor of the ascending colon
• 209.54
  Benign carcinoid tumor of the transverse colon
• 209.55
  Benign carcinoid tumor of the descending colon
• 209.56
  Benign carcinoid tumor of the sigmoid colon
• 209.57
  Benign carcinoid tumor of the rectum
• 209.6
  Benign carcinoid tumors of other and unspecified sites
• 209.60
  Benign carcinoid tumor of unknown primary site
• 209.61
  Benign carcinoid tumor of the bronchus and lung
• 209.62
  Benign carcinoid tumor of the thymus
• 209.63
  Benign carcinoid tumor of the stomach
• 209.64
  Benign carcinoid tumor of the kidney
• 209.65
  Benign carcinoid tumor of the foregut NOS
• 209.66
  Benign carcinoid tumor of the midgut NOS
• 209.67
  Benign carcinoid tumor of the hindgut NOS
• 209.69
  Benign carcinoid tumors of other sites
• 209.7
  Secondary neuroendocrine tumors
• 209.70
  Secondary neuroendocrine tumor, unspecified site
• 209.71
  Secondary neuroendocrine tumor of distant lymph nodes
• 209.72
  Secondary neuroendocrine tumor of liver
• 209.73
  Secondary neuroendocrine tumor of bone
• 209.74
  Secondary neuroendocrine tumor of peritoneum
• 209.75
  Secondary Merkel cell carcinoma
• 209.79
  Secondary neuroendocrine tumor of other sites

Code first any associated multiple endocrine neoplasia syndrome (258.01-258.03)
Use additional code to identify associated endocrine syndrome, such as:
carcinoid syndrome (259.2)

Excludes: benign pancreatic islet cell tumors (211.7)
malignant pancreatic islet cell tumors (157.4)

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