Convert to ICD-10-CM: 
921.0 converts approximately to:
- 2015/16 ICD-10-CM S00.10XA Contusion of unspecified eyelid and periocular area, initial encounter
 
 ICD-9-CM Volume 2 Index entries containing back-references to 
921.0:
- Black
eye NEC 921.0
 - Ecchymosis (multiple) 459.89

eye (traumatic) 921.0