An official website of the United States government
Home
SEER Inquiry System - Report
Produced: 04/03/2026 5:02 AM
Question 20110094
Inquiry Details
References:
2010 SEER Manual. Appendix C
Question:
Surgery of Primary Site--Breast: Is a "nipple sparing mastectomy" coded to 30 [subcutaneous mastectomy] or 40 [total (simple) mastectomy] if the nipple/areolar complex was not removed but the pathology specimen indicates some breast skin was removed? See Discussion.
Discussion:
In the past, the SEER Manual indicated that code 30 [subcutaneous mastectomies], which captured nipple-sparing mastectomies, would rarely be used because it was not typically performed as treatment for a malignancy. This note was removed from the 2010 SEER Manual, Appendix C. Code 30 which now states, "A subcutaneous mastectomy is the removal of breast tissue without the nipple and areolar complex or overlying skin." More "nipple-sparing mastectomies" are now being performed at certain facilities.
Should the Surgery of Primary Site field be coded to 30 when a nipple-sparing mastectomy with reconstruction is performed, even if there is skin removal? Or, does the skin removal indicate that this is not a subcutaneous mastectomy, and therefore code 43 [Total (simple) mastectomy with reconstruction, NOS] applies?
Answer:
Code Surgery of Primary Site to 30 [Subcutaneous mastectomy] for this case.
Assign code 30 when the nipple and areolar complex are NOT removed. Assign code 40 (or higher) when the nipple and areolar complex ARE removed.
