2007 ICD-9-CM Procedure 85.31 Unilateral reduction mammoplasty 85.31 is a specific code that can be used to specify a procedure 85.31 contains 9 index entries View the full Volume 3 85.* hierarchy 85.31 also known as: Unilateral: amputative mammoplasty size reduction mammoplasty Index entries containing 85.31: Biesenberger operation (size reduction of breast, bilateral) 85.32 unilateral 85.31 Mammoplasty 85.89 amputative (reduction) (bilateral) 85.32 unilateral 85.31 reduction (bilateral) 85.32 unilateral 85.31 size reduction (gynecomastia) (bilateral) 85.32 unilateral 85.31 Operation Biesenberger (size reduction of breast, bilateral) 85.32 unilateral 85.31 Reduction - see also Excision, by site breast (bilateral) 85.32 unilateral 85.31 mammoplasty (bilateral) 85.32 unilateral 85.31 size breast (bilateral) 85.32 unilateral 85.31 Size reduction breast (bilateral) 85.32 unilateral 85.31