C44Other and unspecified malignant neoplasm of skin

C44 is the ICD-10-CM diagnosis code for other and unspecified malignant neoplasm of skin. It belongs to 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 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: C44.0 (of lip), C44.1 (of eyelid, including canthus), C44.2 (of ear and external auricular canal), C44.3 (of other and unspecified parts of face), C44.4 (of scalp and neck), C44.5 (of trunk), C44.6 (of upper limb, including shoulder), C44.7 (of lower limb, including hip) and 2 more.

Don't report C44 together with the conditions in its Excludes1 note: Kaposi's sarcoma of skin (C46.0), malignant melanoma of skin (C43.-), malignant neoplasm of skin of genital organs (C51-C52, C60.-, C63.2) and Merkel cell carcinoma (C4A.-).

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