The coding defect of Pedicle screw internal fixation is due to the lack of clinical knowledge of the coder, which should be omitted or coded at 84.82 according to different purposes. The coding defect of LAPAROSCOPIC rectal resection is due to the misuse of residual categories and should be coded according to the specific surgical procedure. The coding defect of Transcatheter intracranial thrombectomy is that the coding is not specific and should be coded according to the specific Anatomic site. The coding defect of Lobectomy with lymphadenectomy is that the coder relies too much on the computer dictionary and should code according to the actual operation.