C31

icd
Non-Billable

Malignant neoplasm of accessory sinuses


Guidelines

Excludes1
C30-C39mesothelioma (C45.-)
Includes
C30-C39malignant neoplasm of middle ear
Notes
2
  • 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).

Related Codes

C31icd
Malignant neoplasm of accessory sinuses
Malignant neoplasm of maxillary sinus
Malignant neoplasm of ethmoidal sinus
Malignant neoplasm of frontal sinus
Malignant neoplasm of sphenoid sinus
Malignant neoplasm of overlapping sites of accessory sinuses
Malignant neoplasm of accessory sinus, unspecified