ICD-9-CM diagnosis code (retired)
172.4 — Malignant melanoma of skin of scalp and neck
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 172.4
172.4 is an ICD-9-CM diagnosis code for malignant melanoma of skin of scalp and neck. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to 2 ICD-10-CM codes, such as C43.4 (Malignant melanoma of scalp and neck) and D03.4 (Melanoma in situ of scalp and neck). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 172.4
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.