Convert to ICD-10-CM: 
813.12 converts approximately to:
- 2015/16 ICD-10-CM S52.043B Displaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or IIOr: 
- 2015/16 ICD-10-CM S52.043C Displaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIICOr: 
- 2015/16 ICD-10-CM S52.046B Nondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type I or IIOr: 
- 2015/16 ICD-10-CM S52.046C Nondisplaced fracture of coronoid process of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIIC
 ICD-9-CM Volume 2 Index entries containing back-references to 
813.12:
- Fracture (abduction) (adduction) (avulsion) (compression) (crush) (dislocation) (oblique) (separation) (closed) 829.0  coronoid process (ulna) (closed) 813.02 coronoid process (ulna) (closed) 813.02   mandible (closed) 802.23 mandible (closed) 802.23 
  open 813.12 open 813.12
 
  ulna (alone) (closed) 813.82 ulna (alone) (closed) 813.82   with radius NEC 813.83 with radius NEC 813.83 
  coronoid process (closed) 813.02 coronoid process (closed) 813.02 
  distal end - see Fracture, ulna, lower end distal end - see Fracture, ulna, lower end
  epiphysis epiphysis   lower - see Fracture, ulna, lower end lower - see Fracture, ulna, lower end
   upper - see Fracture, ulna, upper, end upper - see Fracture, ulna, upper, end
 
  head - see Fracture, ulna, lower end head - see Fracture, ulna, lower end
  lower end (distal end) (head) (lower epiphysis) (styloid process) 813.43 lower end (distal end) (head) (lower epiphysis) (styloid process) 813.43 
  olecranon process (closed) 813.01 olecranon process (closed) 813.01 
  open NEC 813.92 open NEC 813.92 
  pathologic 733.12 pathologic 733.12 
  proximal end - see Fracture, ulna, upper end proximal end - see Fracture, ulna, upper end
  shaft 813.22 shaft 813.22 
  styloid process - see Fracture, ulna, lower end styloid process - see Fracture, ulna, lower end
  transverse - see Fracture, ulna, by site transverse - see Fracture, ulna, by site
  upper end (epiphysis) 813.04 upper end (epiphysis) 813.04