D04.9

Carcinoma in situ of skin, unspecified

Billable / specific

D04.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from D04)

  • Bowen's disease
  • erythroplasia
  • grade III intraepithelial neoplasia
  • Queyrat's erythroplasia
  • 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).

Excludes1

Not coded here — never report together with this code.

  • erythroplasia of Queyrat (penis) NOS (D07.4) (from D04)
  • melanoma in situ (D03.-) (from D04)

Also known as

  • Adenocarcinoma, apocrine, in situ, unspecified site

Parent code

  • D04Carcinoma in situ of skinHeader

Related codes

  • D04.0Carcinoma in situ of skin of lipBillable
  • D04.1Carcinoma in situ of skin of eyelid, including canthusHeader
  • D04.2Carcinoma in situ of skin of ear and external auricular canalHeader
  • D04.3Carcinoma in situ of skin of other and unspecified parts of faceHeader
  • D04.4Carcinoma in situ of skin of scalp and neckBillable
  • D04.5Carcinoma in situ of skin of trunkBillable
  • D04.6Carcinoma in situ of skin of upper limb, including shoulderHeader
  • D04.7Carcinoma in situ of skin of lower limb, including hipHeader
  • D04.8Carcinoma in situ of skin of other sitesBillable

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