• All Diagnostic Codes
• Injury, poisoning and certain other consequences of external causes (S00-T88)
• Injuries to the head (S00-S09)
• S04 - Injury of cranial nerve
  • S04.0 - Injury of optic nerve and pathways
  • S04.1 - Injury of oculomotor nerve
  • S04.2 - Injury of trochlear nerve
  • S04.3 - Injury of trigeminal nerve
  • S04.4 - Injury of abducent nerve
  • S04.5 - Injury of facial nerve
  • S04.6 - Injury of acoustic nerve
  • S04.7 - Injury of accessory nerve
  • S04.8 - Injury of other cranial nerves
  • S04.9 - Injury of unspecified cranial nerve

S04 is a valid ICD-10-CM diagnosis code meaning 'Injury of cranial nerve'.

It is also suitable for:

• The selection of side should be based on the side of the body being affected

Must Code Etiology Before Coding S04

Some conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation.

S04 is a manifestation code. For it to be valid, one of the following etiology codes must also be coded first:

• any associated intracranial injury (S06.-)

Two Codes Required to Describe Condition

Two codes may be required to fully describe the patient's condition, but the sequencing of the two codes is discretionary, depending on the severity of the conditions and the reason for the patient encounter.

• any associated:
• open wound of head (S01.-)
• skull fracture (S02.-)