Convert to ICD-10-CM: 
172.0 converts approximately to:
- 2015/16 ICD-10-CM C43.0 Malignant melanoma of lipOr: 
- 2015/16 ICD-10-CM D03.0 Melanoma in situ of lip
 ICD-9-CM Volume 2 Index entries containing back-references to 
172.0:
- Melanoma (malignant) (M8720/3) 172.9  lip (lower) (upper) 172.0 lip (lower) (upper) 172.0