ICD-10-CM > Z00-Z99 > Z00-Z13 > Z12 > Z12.1 Z12.1 Encounter for screening for malignant neoplasm of intestinal tract Non-Billable/Non-Specific Codes Z12.10Encounter for screening for malignant neoplasm of intestinal tract, unspecifiedZ12.11Encounter for screening for malignant neoplasm of colonZ12.12Encounter for screening for malignant neoplasm of rectumZ12.13Encounter for screening for malignant neoplasm of small intestine