2007 ICD-9-CM Procedure 27.91 Labial frenotomy 27.91 is a specific code that can be used to specify a procedure 27.91 contains 4 index entries View the full Volume 3 27.* hierarchy 27.91 also known as: Division of labial frenum 27.91 excludes: lingual frenotomy (25.91) Index entries containing 27.91: Clipping frenulum, frenum labia (lips) 27.91 Division frenulum, frenum labial 27.91 labial frenum 27.91 Frenotomy labial 27.91