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Resection Finger Nail to No Qualifier with No Device, External Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | H Skin and Breast |
| Operation | T Resection |
| Body Part | Q Finger Nail |
| Approach | X External |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Cutting out or off, without replacement, all of a body part
Procedure Overview
Resection procedures on the skin and breast involve cutting out an entire body part rather than a sample or lesion. In this family, that most often means a mastectomy for breast cancer, or occasionally full-thickness removal of skin over a defined region, such as the entire nipple-areolar complex. The defining feature is completeness: the surgeon takes the whole named structure, not a margin around a mass.
These operations are done when disease, most commonly malignancy, has progressed to the point where partial removal would leave unacceptable risk of recurrence, or when the anatomy itself is being eliminated for prevention, such as a prophylactic mastectomy in a patient with a strong genetic predisposition. Reconstruction, if performed, is coded separately as its own procedure.
Recovery and follow-up depend heavily on what was resected and why, but the shared thread is that the tissue removed does not grow back and no portion of the original structure remains in that location.
Anatomy & Axis Detail
Finger Nail
Resection of a finger nail refers to complete surgical removal of the nail plate along with its supporting structures, typically the nail bed and matrix, distinguishing it from simple nail plate avulsion which would be coded as excision or extraction of a lesser structure. This more extensive procedure, often called matrixectomy or onychectomy, is performed for chronic or recurrent ingrown nails unresponsive to conservative treatment, severe nail dystrophy, chronic paronychia, or suspected tumor of the nail unit requiring definitive removal to prevent regrowth. Because the matrix is the germinal tissue responsible for nail regeneration, its removal is what permanently eliminates the nail rather than allowing it to regrow, which is the key clinical distinction driving whether a case is documented as resection versus a more limited excision procedure.
Approach: External
External approach applies to procedures performed directly on the skin or mucous membrane, or on an accessible body surface, without any instrumentation passing through a puncture or orifice. It covers things like manual reduction of a fracture or excision of a skin lesion. It differs from Via Natural or Artificial Opening in that no internal passage is entered at all, only the exposed surface.
Coding & Documentation
The operative note must state that the entirety of the body part, such as the whole breast, was removed, not just a nodule or wedge. Pathology confirming a full specimen and the surgeon's language describing complete removal are what supports Resection over Excision.
The most common assignment error is choosing Resection when the documentation actually describes a partial procedure, such as a lumpectomy or partial mastectomy, which is coded to Excision instead. Coders also sometimes miss that skin resections are distinct from breast resections at the body part level, even though both fall under the same root operation, so the correct body part character still has to reflect exactly which structure, left or right breast, or a specific skin region, was taken.