ICD-10-CM > N00-N99 > N60-N65 > N61 > N61.2 N61.2 Granulomatous mastitis Non-Billable/Non-Specific Codes N61.20Granulomatous mastitis, unspecified breastN61.21Granulomatous mastitis, right breastN61.22Granulomatous mastitis, left breastN61.23Granulomatous mastitis, bilateral breast