Final answer:
Z12.11, D12.6, and D12.8 are the correct diagnosis codes for a benign colon and rectal polyps found during a screening colonoscopy.
Step-by-step explanation:
The correct diagnosis codes for a 60-year-old admitted for screening colonoscopy who had colon and rectal polyps found, which pathology indicated as benign, would be D12.6, Z12.11, and D12.8. Here, D12.6 represents benign neoplasm of the colon, D12.8 represents benign neoplasm of other and unspecified parts of the intestine, and Z12.11 is the code for encounter for screening for malignant neoplasm of the colon. Since the patient was admitted for a screening purpose and polyps were found in both colon and rectum, it is appropriate to use the screening code (Z12.11) in addition to the specific codes for the benign polyps (D12.6 for colon, D12.8 for rectum). Thus, the correct answer is D) Z12.11, D12.6, D12.8.