Convert to ICD-10-CM: 
380.50 converts approximately to:
- 2015/16 ICD-10-CM H61.309 Acquired stenosis of external ear canal, unspecified, unspecified earOr: 
- 2015/16 ICD-10-CM H61.399 Other acquired stenosis of external ear canal, unspecified ear
 ICD-9-CM Volume 2 Index entries containing back-references to 
380.50:
- Collapse 780.2  external ear canal 380.50 external ear canal 380.50  secondary to secondary to
 
 
- Constriction canal, ear (see also Stricture, ear canal, acquired) 380.50 canal, ear (see also Stricture, ear canal, acquired) 380.50
 
- Deformity 738.9  auditory canal (congenital) (external) (see also Deformity, ear) 744.3 auditory canal (congenital) (external) (see also Deformity, ear) 744.3   acquired 380.50 acquired 380.50
 
 
- Narrowing auditory canal (external) (see also Stricture, ear canal, acquired) 380.50 auditory canal (external) (see also Stricture, ear canal, acquired) 380.50
 
- Obstruction, obstructed, obstructive canal, ear (see also Stricture, ear canal, acquired) 380.50 canal, ear (see also Stricture, ear canal, acquired) 380.50
 
- Stenosis (cicatricial) - see also Stricture external ear canal 380.50 external ear canal 380.50  secondary to secondary to
 
 
- Stricture (see also Stenosis) 799.89  auditory canal (congenital) (external) 744.02 auditory canal (congenital) (external) 744.02   acquired (see also Stricture, ear canal, acquired) 380.50 acquired (see also Stricture, ear canal, acquired) 380.50
 
  ear canal (external) (congenital) 744.02 ear canal (external) (congenital) 744.02   acquired 380.50 acquired 380.50
 
  meatus meatus  ear (congenital) 744.02 ear (congenital) 744.02    acquired (see also Stricture, ear canal, acquired) 380.50 acquired (see also Stricture, ear canal, acquired) 380.50
 
  osseous (congenital) (ear) 744.03 osseous (congenital) (ear) 744.03    acquired (see also Stricture, ear canal, acquired) 380.50 acquired (see also Stricture, ear canal, acquired) 380.50
 
  urinarius (see also Stricture, urethra) 598.9 urinarius (see also Stricture, urethra) 598.9 
 
  osseous meatus (congenital) (ear) 744.03 osseous meatus (congenital) (ear) 744.03   acquired (see also Stricture, ear canal, acquired) 380.50 acquired (see also Stricture, ear canal, acquired) 380.50