ICD-10-CM > Z00-Z99 > Z20-Z29 > Z20 > Z20.0 Z20.0 Contact with and (suspected) exposure to intestinal infectious diseases Non-Billable/Non-Specific Codes Z20.01Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)Z20.09Contact with and (suspected) exposure to other intestinal infectious diseases