ICD-10-CM > Z00-Z99 > Z16-Z16 > Z16 > Z16.1 Z16.1 Resistance to beta lactam antibiotics Non-Billable/Non-Specific Codes Z16.10Resistance to unspecified beta lactam antibioticsZ16.11Resistance to penicillinsZ16.12Extended spectrum beta lactamase (ESBL) resistanceZ16.13Resistance to carbapenemZ16.19Resistance to other specified beta lactam antibiotics