2024 ICD-10-CM Diagnosis Code C7B: Secondary neuroendocrine tumors (2024)

Use Additional

Use Additional Help

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.

• code to identify any functional activity

The following code(s) above C7B contain annotation back-references

Annotation Back-References

that may be applicable to C7B:

• C00-D49

  2024 ICD-10-CM Range C00-D49

  Neoplasms

  Note

  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

  Neoplasms

C7A.090 Malignant carcinoid tumor of the bronchus and lung

C7A.091 Malignant carcinoid tumor of the thymus

C7A.092 Malignant carcinoid tumor of the stomach

C7A.093 Malignant carcinoid tumor of the kidney

C7A.094 Malignant carcinoid tumor of the foregut, unspecified

C7A.095 Malignant carcinoid tumor of the midgut, unspecified

C7A.096 Malignant carcinoid tumor of the hindgut, unspecified

C7A.098 Malignant carcinoid tumors of other sites

C7A.1 Malignant poorly differentiated neuroendocrine tumors

C7A.8 Other malignant neuroendocrine tumors

C7B Secondary neuroendocrine tumors

C7B.0 Secondary carcinoid tumors

C7B.00 …… unspecified site

C7B.01 …… of distant lymph nodes

C7B.1 Secondary Merkel cell carcinoma

C7B.8 Other secondary neuroendocrine tumors

C76 Malignant neoplasm of other and ill-defined sites