Answer: B
C50.512 is the appropriate code because it codes for malignant neoplasm of the lower-outer quadrant of the breast in females which is the diagnosis in this patient.
Option A is not correct because C50.511 codes for malignant neoplasm of the lower outer quadrant of the right female breast.
Option C is not correct because C50.519 codes for malignant neoplasm of the lower-outer quadrant of an unspecified female breast.
Option D is not correct because C50.111codes for malignant neoplasm of the central portion of the right female breast.
