Table 1.

ICD-9CM codes for conservative, reconstructive and mastectomy interventions

Type of intervention	Old algorithm’s HDR codes	New algorithm’s HDR codes
Conservative	85.2* Excision or destruction of breast tissue or 85.3* Reduction mammoplasty and subcutaneous mammectomy	85.2* Excision or destruction of breast tissue or 85.31 Unilateral reduction mammoplasty or 85.32 Bilateral reduction mammoplasty or
Reconstructive		85.4* + 85.53 Unilateral breast implant or 85.4* + 85.54 Bilateral breast implant or 85.4* + 85.95 Insertion of breast tissue expander or 85.33 Unilateral subcutaneous mammectomy with synchronous implant or 85.35 Bilateral subcutaneous mammectomy with synchronous implant 85.34 Other unilateral subcutaneous mammectomy or + 85.53/85.54/85.95 85.36 Other bilateral subcutaneous mammectomy + 85.53/85.54/85.95
Mastectomy	85.4* Mastectomy	85.4* Mastectomy