2007 ICD-9-CM Procedure 91.6 Microscopic examination of specimen from skin and other integument 91.6 is a non-specific code that should not be used to specify a procedure 91.6 contains 4 index entries View the full Volume 3 91.* hierarchy 91.6 also known as: Microscopic examination of: hair nails skin 91.6 excludes: mucous membrane -- code to organ site that of operative wound (91.70-91.79) Index entries containing 91.6: Examination (for) microscopic (specimen) (of) 91.9 breast 91.6 hair 91.6 nails 91.6 skin 91.6