C44.9Other and unspecified malignant neoplasm of skin, unspecified

C44.9 is the ICD-10-CM diagnosis code for other and unspecified malignant neoplasm of skin, unspecified. It belongs to category C44 (other and unspecified malignant neoplasm of skin), block C43-C44 (melanoma and other malignant neoplasms of skin) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within C44, choose C44.9 (unspecified) only when documentation doesn't support a more specific option: of lip (C44.0), of eyelid, including canthus (C44.1), of ear and external auricular canal (C44.2), of other and unspecified parts of face (C44.3), of scalp and neck (C44.4), of trunk (C44.5), of upper limb, including shoulder (C44.6), of lower limb, including hip (C44.7) and 1 more.

To report this condition, pick the subcode that matches the documentation: C44.90 (unspecified), C44.91 (unspecified), C44.92 (unspecified) and C44.99 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.