Convert to ICD-10-CM: 
380.9 converts approximately to:
- 2015/16 ICD-10-CM H61.93 Disorder of external ear, unspecified, bilateral
 
 ICD-9-CM Volume 2 Index entries containing back-references to 
380.9:
- Disease, diseased - see also Syndrome
auditory canal, ear 380.9
external auditory canal 380.9
outer ear 380.9
 - Disorder - see also Disease