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D04Non-billableSave

D04 - Carcinoma in situ of skin

ICD-10-CM Chapter 2: Neoplasms · D00-D09 In situ neoplasms (D00-D09) · Top-level category · FY2027

Coding Guidance

D04 is a non-billable heading. Report one of the 10 more specific codes below.

Includes, Excludes and Coding Notes

Excludes 1 — Not Coded HereFrom D04

Mutually exclusive: these conditions are never reported together with this code.

  • erythroplasia of Queyrat (penis) NOS (D07.4)
  • melanoma in situ (D03.-)
IncludesFrom D00-D09 In situ neoplasms (D00-D09)

Conditions this code covers.

  • Bowen's disease
  • erythroplasia
  • grade III intraepithelial neoplasia
  • Queyrat's erythroplasia
NotesFrom Chapter C00-D49

Instructional notes from the ICD-10-CM tabular list.

  • 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).

More Specific Codes (10)

D04.0Carcinoma in situ of skin of lip→D04.1Carcinoma in situ of skin of eyelid, including canthus→D04.2Carcinoma in situ of skin of ear and external auricular canal→D04.3Carcinoma in situ of skin of other and unspecified parts of face→D04.4Carcinoma in situ of skin of scalp and neck→D04.5Carcinoma in situ of skin of trunk→D04.6Carcinoma in situ of skin of upper limb, including shoulder→D04.7Carcinoma in situ of skin of lower limb, including hip→D04.8Carcinoma in situ of skin of other sites→D04.9Carcinoma in situ of skin, unspecified→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with D04.