What defines the root operation of resection?

The root operation of resection in the context of ICD-10-CM coding is defined as cutting out all of a specific body part. This operation involves the complete excision or removal of an entire organ or structure from the body. It is important to differentiate resection from other similar procedures. For instance, cutting out a portion of a body part fits a different definition and would be categorized under the root operation of "excision" rather than resection. Similarly, the third option, which refers to just removing tissue, does not specify the complete removal of an entire organ. The last option pertains to procedures that involve creating a new opening, which also does not align with the definition of resection. By focusing on the complete removal of a body part, this understanding reinforces the precise coding needed in clinical documentation and ensures proper classification in medical records.