2007 ICD-9-CM Procedure 73.21 Internal and combined version without extraction A form or variant of a type or original. 73.21 is a specific code that can be used to specify a procedure 73.21 contains 4 index entries View the full Volume 3 73.* hierarchy 73.21 also known as: Version NOS Index entries containing 73.21: Version, obstetrical (bimanual) (cephalic) (combined) (internal) (podalic) 73.21 with extraction 73.22 Braxton Hicks 73.21 with extraction 73.22 external (bipolar) 73.91 Potter's (podalic) 73.21 with extraction 73.22 Wigand's (external) 73.91 Wright's (cephalic) 73.21 with extraction 73.22