D03

Melanoma in situ

FY2027Chapter 2: Neoplasms/D00–D09 In situ neoplasms

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

D03 is a non-billable ICD-10-CM code category for melanoma in situ. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are D03.0 Melanoma in situ of lip; D03.1 Melanoma in situ of eyelid, including canthus; D03.2 Melanoma in situ of ear and external auricular canal; D03.3 Melanoma in situ of other and unspecified parts of face and 6 more.

Includes

Further defines or gives examples of the content of the category.

Also from chapter/block level (4 notes)

Inherited from D00–D09 In situ neoplasms

Bowen's disease
erythroplasia
grade III intraepithelial neoplasia
Queyrat's erythroplasia

Notes

Also from chapter/block level (8 notes)

Inherited from Chapter 2 Neoplasms

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 under D03 10