D03.20
Melanoma in situ of unspecified ear and external auricular canal
BillableComplete code, valid to report
D03.20 (also written D0320) is a billable ICD-10-CM diagnosis code for melanoma in situ of unspecified ear and external auricular canal. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 23 codes in category D03 (Melanoma in situ).
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).