ICD-10-CM > H60-H95 > H60-H62 > H61 > H61.8 > H61.81 H61.81 Exostosis of external canal Non-Billable/Non-Specific Codes H61.811Exostosis of right external canalH61.812Exostosis of left external canalH61.813Exostosis of external canal, bilateralH61.819Exostosis of external canal, unspecified ear