813.44 can be converted using the following scenario:
Scenario 1
- 2015/16 ICD-10-CM S52.609A Unspecified fracture of lower end of unspecified ulna, initial encounter for closed fracture
With:
- 2015/16 ICD-10-CM S52.509A Unspecified fracture of the lower end of unspecified radius, initial encounter for closed fracture
 ICD-9-CM Volume 2 Index entries containing back-references to 
813.44:
- Fracture (abduction) (adduction) (avulsion) (compression) (crush) (dislocation) (oblique) (separation) (closed) 829.0  radius (alone) (closed) 813.81 radius (alone) (closed) 813.81   with ulna NEC 813.83 with ulna NEC 813.83 
  distal end - see Fracture, radius, lower end distal end - see Fracture, radius, lower end
  epiphysis epiphysis   lower - see Fracture, radius, lower end lower - see Fracture, radius, lower end
   upper - see Fracture, radius, upper end upper - see Fracture, radius, upper end
 
  head - see Fracture, radius, upper end head - see Fracture, radius, upper end
  lower end or extremity (distal end) (lower epiphysis) 813.42 lower end or extremity (distal end) (lower epiphysis) 813.42 
  neck - see Fracture, radius, upper end neck - see Fracture, radius, upper end
  open NEC 813.91 open NEC 813.91 
  pathologic 733.12 pathologic 733.12 
  proximal end - see Fracture, radius, upper end proximal end - see Fracture, radius, upper end
  shaft (closed) 813.21 shaft (closed) 813.21 
  upper end 813.07 upper end 813.07 
 
  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    with radius (lower end) 813.44 with radius (lower end) 813.44
   open 813.53 open 813.53 
 
  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