S42.309A is a billable ICD code used to specify a diagnosis of unspecified fracture of shaft of humerus, unspecified arm, initial encounter for closed fracture. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
A Holstein–Lewis fracture is a fracture of the distal third of the humerus resulting in entrapment of the radial nerve.
ICD Code S42.351 is a non-billable code. To code a diagnosis of this type, you must use specify a 7th character that describes the diagnosis 'displaced comminuted fracture of shaft of humerus, right arm' in more detail. The 7th characters that can be added, and the resulting billable codes, are as follows:
A Holstein–Lewis fracture is a fracture of the distal third of the humerus resulting in entrapment of the radial nerve.