Convert to ICD-10-CM: 
904.40 converts approximately to:
- 2015/16 ICD-10-CM S85.009A Unspecified injury of popliteal artery, unspecified leg, initial encounter
Or:
 - 2015/16 ICD-10-CM S85.509A Unspecified injury of popliteal vein, unspecified leg, initial encounter
 
 ICD-9-CM Volume 2 Index entries containing back-references to 
904.40: