C4A.3

Merkel cell carcinoma of other and unspecified parts of face

Non-billable header

C4A.3 is a non-billable header code. Use one of the more specific codes below.

Inclusion terms

Includes (from C4A)

  • Note: Functional activity
  • Note: 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.
  • Note: Morphology [Histology]
  • Note: 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.
  • Note: Primary malignant neoplasms overlapping site boundaries
  • Note: 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.
  • Note: Malignant neoplasm of ectopic tissue
  • Note: 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).

Parent code

  • C4AMerkel cell carcinomaHeader

More specific codes C4A.3

  • C4A.30Merkel cell carcinoma of unspecified part of faceBillable
  • C4A.31Merkel cell carcinoma of noseBillable
  • C4A.39Merkel cell carcinoma of other parts of faceBillable

Related codes

  • C4A.0Merkel cell carcinoma of lipBillable
  • C4A.1Merkel cell carcinoma of eyelid, including canthusHeader
  • C4A.2Merkel cell carcinoma of ear and external auricular canalHeader
  • C4A.4Merkel cell carcinoma of scalp and neckBillable
  • C4A.5Merkel cell carcinoma of trunkHeader
  • C4A.6Merkel cell carcinoma of upper limb, including shoulderHeader
  • C4A.7Merkel cell carcinoma of lower limb, including hipHeader
  • C4A.8Merkel cell carcinoma of overlapping sitesBillable
  • C4A.9Merkel cell carcinoma, unspecifiedBillable

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