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Excision Supernumerary Breast to No Qualifier with No Device, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | H Skin and Breast |
| Operation | B Excision |
| Body Part | Y Supernumerary Breast |
| Approach | 0 Open |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Cutting out or off, without replacement, a portion of a body part
Procedure Overview
Excision procedures remove a portion of skin or breast tissue without replacing it, and this family spans everything from a shave biopsy of a suspicious mole to a lumpectomy removing a breast tumor with a margin of surrounding tissue. The common thread is that a defined piece of tissue, not the entire organ or structure, is cut away and typically sent to a pathology lab for examination.
Patients most often encounter this family when a mole, cyst, or lump needs to be evaluated or treated, or when a breast biopsy is needed to characterize a finding seen on imaging. Because only part of the body part is taken, the surrounding skin or breast tissue remains intact, which distinguishes these procedures from more extensive surgery that removes an entire structure.
Anatomy & Axis Detail
Supernumerary Breast
A supernumerary breast is an accessory mammary structure that develops along the embryonic milk line, most often appearing in the axilla or upper abdomen, and is excised when it becomes symptomatic, cosmetically bothersome, or when imaging raises concern for the same range of pathology, including fibroadenoma or malignancy, that can occur in normal breast tissue. Because this accessory tissue is hormonally responsive like typical breast parenchyma, it can enlarge with pregnancy, lactation, or the menstrual cycle, which sometimes prompts the initial presentation and surgical referral. Excision generally removes the entire accessory gland along with any associated nipple or areolar tissue if present, since incomplete removal can leave functional tissue behind. Because supernumerary breast tissue can occur at variable sites and is not paired like normal breasts, laterality is not typically a factor in how this body part is coded.
Approach: Open
Open approach means the surgeon cuts through skin, mucous membrane, or other tissue layers to physically expose the target site to view before performing the procedure. It gives direct visualization and hands-on access, distinguishing it from Percutaneous approaches where instruments pass through a small puncture without exposing the site. Open is typical for procedures needing wide access, such as most laparotomies.
Coding & Documentation
Documentation should describe the amount of tissue removed, any margins taken, and whether the intent was diagnostic (an excisional biopsy) or therapeutic. Coders must pay close attention to whether the note describes removal of only part of the breast or skin versus the entire body part, since removing an entire breast is coded to Resection rather than Excision even though both involve cutting tissue away. A common mistake is coding a partial mastectomy or wide local excision as Resection out of habit, or conversely under-coding a case that actually removed the whole breast as Excision.