2007 ICD-9-CM Procedure 49.52 Posterior anal sphincterotomy 49.52 is a specific code that can be used to specify a procedure 49.52 contains 2 index entries View the full Volume 3 49.* hierarchy Index entries containing 49.52: Division sphincter anal (external) (internal) 49.59 posterior 49.52 Sphincterotomy anal (external) (internal) 49.59 posterior 49.52