| Z16 | Resistance to antimicrobial drugs | NON-BILLABLE CODE |
| Z16.1 | Resistance to beta lactam antibiotics | NON-BILLABLE CODE |
| Z16.11 | Resistance to penicillins | BILLABLE CODE |
| Z16.12 | Extended spectrum beta lactamase (ESBL) resistance | BILLABLE CODE |
| Z16.13 | Resistance to carbapenem | BILLABLE CODE |
| Z16.19 | Resistance to other specified beta lactam antibiotics | BILLABLE CODE |
| Z16.2 | Resistance to other antibiotics | NON-BILLABLE CODE |
| Z16.20 | Resistance to unspecified antibiotic | BILLABLE CODE |
| Z16.21 | Resistance to vancomycin | BILLABLE CODE |
| Z16.22 | Resistance to vancomycin related antibiotics | BILLABLE CODE |
| Z16.23 | Resistance to quinolones and fluoroquinolones | BILLABLE CODE |
| Z16.24 | Resistance to multiple antibiotics | BILLABLE CODE |
| Z16.29 | Resistance to other single specified antibiotic | BILLABLE CODE |
| Z16.3 | Resistance to other antimicrobial drugs | NON-BILLABLE CODE |
| Z16.30 | Resistance to unspecified antimicrobial drugs | BILLABLE CODE |
| Z16.31 | Resistance to antiparasitic drug(s) | BILLABLE CODE |
| Z16.32 | Resistance to antifungal drug(s) | BILLABLE CODE |
| Z16.33 | Resistance to antiviral drug(s) | BILLABLE CODE |
| Z16.34 | Resistance to antimycobacterial drug(s) | NON-BILLABLE CODE |
| Z16.341 | Resistance to single antimycobacterial drug | BILLABLE CODE |
| Z16.342 | Resistance to multiple antimycobacterial drugs | BILLABLE CODE |
| Z16.35 | Resistance to multiple antimicrobial drugs | BILLABLE CODE |
| Z16.39 | Resistance to other specified antimicrobial drug | BILLABLE CODE |
