2007 ICD-9-CM Procedure 40.22 Excision of internal mammary lymph node 40.22 is a specific code that can be used to specify a procedure 40.22 contains 1 index entry View the full Volume 3 40.* hierarchy Index entries containing 40.22: Excision lymph, lymphatic node (simple) NEC 40.29 mammary (internal) 40.22 external 40.29 radical 40.59 regional (extended) 40.3 radical 40.59 regional (extended) 40.3