ICD-10-CM Code S04

Injury of cranial nerve

  1. ICD-10-CM Index
  2. Chapter: S00–T98
  3. Section: S00-S09
  4. Block: S04
  5. S04 - Injury of cranial nerve
Version 2020 Non-Billable Code

Not Valid for Submission

S04 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of injury of cranial nerve. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:S04
Short Description:Injury of cranial nerve
Long Description:Injury of cranial nerve

Consider the following ICD-10 codes with a higher level of specificity:

  • S04.0 - Injury of optic nerve and pathways
  • S04.01 - Injury of optic nerve
  • S04.011 - Injury of optic nerve, right eye
  • S04.011A - Injury of optic nerve, right eye, initial encounter
  • S04.011D - Injury of optic nerve, right eye, subsequent encounter
  • S04.011S - Injury of optic nerve, right eye, sequela
  • S04.012 - Injury of optic nerve, left eye
  • S04.012A - Injury of optic nerve, left eye, initial encounter
  • S04.012D - Injury of optic nerve, left eye, subsequent encounter
  • S04.012S - Injury of optic nerve, left eye, sequela
  • S04.019 - Injury of optic nerve, unspecified eye
  • S04.019A - Injury of optic nerve, unspecified eye, initial encounter
  • S04.019D - Injury of optic nerve, unspecified eye, subsequent encounter
  • S04.019S - Injury of optic nerve, unspecified eye, sequela
  • S04.02 - Injury of optic chiasm
  • S04.02XA - Injury of optic chiasm, initial encounter
  • S04.02XD - Injury of optic chiasm, subsequent encounter
  • S04.02XS - Injury of optic chiasm, sequela
  • S04.03 - Injury of optic tract and pathways
  • S04.031 - Injury of optic tract and pathways, right side
  • S04.031A - Injury of optic tract and pathways, right side, initial encounter
  • S04.031D - Injury of optic tract and pathways, right side, subsequent encounter
  • S04.031S - Injury of optic tract and pathways, right side, sequela
  • S04.032 - Injury of optic tract and pathways, left side
  • S04.032A - Injury of optic tract and pathways, left side, initial encounter
  • S04.032D - Injury of optic tract and pathways, left side, subsequent encounter
  • S04.032S - Injury of optic tract and pathways, left side, sequela
  • S04.039 - Injury of optic tract and pathways, unspecified side
  • S04.039A - Injury of optic tract and pathways, unspecified side, initial encounter
  • S04.039D - Injury of optic tract and pathways, unspecified side, subsequent encounter
  • S04.039S - Injury of optic tract and pathways, unspecified side, sequela
  • S04.04 - Injury of visual cortex
  • S04.041 - Injury of visual cortex, right side
  • S04.041A - Injury of visual cortex, right side, initial encounter
  • S04.041D - Injury of visual cortex, right side, subsequent encounter
  • S04.041S - Injury of visual cortex, right side, sequela
  • S04.042 - Injury of visual cortex, left side
  • S04.042A - Injury of visual cortex, left side, initial encounter
  • S04.042D - Injury of visual cortex, left side, subsequent encounter
  • S04.042S - Injury of visual cortex, left side, sequela
  • S04.049 - Injury of visual cortex, unspecified side
  • S04.049A - Injury of visual cortex, unspecified side, initial encounter
  • S04.049D - Injury of visual cortex, unspecified side, subsequent encounter
  • S04.049S - Injury of visual cortex, unspecified side, sequela
  • S04.1 - Injury of oculomotor nerve
  • S04.10 - Injury of oculomotor nerve, unspecified side
  • S04.10XA - Injury of oculomotor nerve, unspecified side, initial encounter
  • S04.10XD - Injury of oculomotor nerve, unspecified side, subsequent encounter
  • S04.10XS - Injury of oculomotor nerve, unspecified side, sequela
  • S04.11 - Injury of oculomotor nerve, right side
  • S04.11XA - Injury of oculomotor nerve, right side, initial encounter
  • S04.11XD - Injury of oculomotor nerve, right side, subsequent encounter
  • S04.11XS - Injury of oculomotor nerve, right side, sequela
  • S04.12 - Injury of oculomotor nerve, left side
  • S04.12XA - Injury of oculomotor nerve, left side, initial encounter
  • S04.12XD - Injury of oculomotor nerve, left side, subsequent encounter
  • S04.12XS - Injury of oculomotor nerve, left side, sequela
  • S04.2 - Injury of trochlear nerve
  • S04.20 - Injury of trochlear nerve, unspecified side
  • S04.20XA - Injury of trochlear nerve, unspecified side, initial encounter
  • S04.20XD - Injury of trochlear nerve, unspecified side, subsequent encounter
  • S04.20XS - Injury of trochlear nerve, unspecified side, sequela
  • S04.21 - Injury of trochlear nerve, right side
  • S04.21XA - Injury of trochlear nerve, right side, initial encounter
  • S04.21XD - Injury of trochlear nerve, right side, subsequent encounter
  • S04.21XS - Injury of trochlear nerve, right side, sequela
  • S04.22 - Injury of trochlear nerve, left side
  • S04.22XA - Injury of trochlear nerve, left side, initial encounter
  • S04.22XD - Injury of trochlear nerve, left side, subsequent encounter
  • S04.22XS - Injury of trochlear nerve, left side, sequela
  • S04.3 - Injury of trigeminal nerve
  • S04.30 - Injury of trigeminal nerve, unspecified side
  • S04.30XA - Injury of trigeminal nerve, unspecified side, initial encounter
  • S04.30XD - Injury of trigeminal nerve, unspecified side, subsequent encounter
  • S04.30XS - Injury of trigeminal nerve, unspecified side, sequela
  • S04.31 - Injury of trigeminal nerve, right side
  • S04.31XA - Injury of trigeminal nerve, right side, initial encounter
  • S04.31XD - Injury of trigeminal nerve, right side, subsequent encounter
  • S04.31XS - Injury of trigeminal nerve, right side, sequela
  • S04.32 - Injury of trigeminal nerve, left side
  • S04.32XA - Injury of trigeminal nerve, left side, initial encounter
  • S04.32XD - Injury of trigeminal nerve, left side, subsequent encounter
  • S04.32XS - Injury of trigeminal nerve, left side, sequela
  • S04.4 - Injury of abducent nerve
  • S04.40 - Injury of abducent nerve, unspecified side
  • S04.40XA - Injury of abducent nerve, unspecified side, initial encounter
  • S04.40XD - Injury of abducent nerve, unspecified side, subsequent encounter
  • S04.40XS - Injury of abducent nerve, unspecified side, sequela
  • S04.41 - Injury of abducent nerve, right side
  • S04.41XA - Injury of abducent nerve, right side, initial encounter
  • S04.41XD - Injury of abducent nerve, right side, subsequent encounter
  • S04.41XS - Injury of abducent nerve, right side, sequela
  • S04.42 - Injury of abducent nerve, left side
  • S04.42XA - Injury of abducent nerve, left side, initial encounter
  • S04.42XD - Injury of abducent nerve, left side, subsequent encounter
  • S04.42XS - Injury of abducent nerve, left side, sequela
  • S04.5 - Injury of facial nerve
  • S04.50 - Injury of facial nerve, unspecified side
  • S04.50XA - Injury of facial nerve, unspecified side, initial encounter
  • S04.50XD - Injury of facial nerve, unspecified side, subsequent encounter
  • S04.50XS - Injury of facial nerve, unspecified side, sequela
  • S04.51 - Injury of facial nerve, right side
  • S04.51XA - Injury of facial nerve, right side, initial encounter
  • S04.51XD - Injury of facial nerve, right side, subsequent encounter
  • S04.51XS - Injury of facial nerve, right side, sequela
  • S04.52 - Injury of facial nerve, left side
  • S04.52XA - Injury of facial nerve, left side, initial encounter
  • S04.52XD - Injury of facial nerve, left side, subsequent encounter
  • S04.52XS - Injury of facial nerve, left side, sequela
  • S04.6 - Injury of acoustic nerve
  • S04.60 - Injury of acoustic nerve, unspecified side
  • S04.60XA - Injury of acoustic nerve, unspecified side, initial encounter
  • S04.60XD - Injury of acoustic nerve, unspecified side, subsequent encounter
  • S04.60XS - Injury of acoustic nerve, unspecified side, sequela
  • S04.61 - Injury of acoustic nerve, right side
  • S04.61XA - Injury of acoustic nerve, right side, initial encounter
  • S04.61XD - Injury of acoustic nerve, right side, subsequent encounter
  • S04.61XS - Injury of acoustic nerve, right side, sequela
  • S04.62 - Injury of acoustic nerve, left side
  • S04.62XA - Injury of acoustic nerve, left side, initial encounter
  • S04.62XD - Injury of acoustic nerve, left side, subsequent encounter
  • S04.62XS - Injury of acoustic nerve, left side, sequela
  • S04.7 - Injury of accessory nerve
  • S04.70 - Injury of accessory nerve, unspecified side
  • S04.70XA - Injury of accessory nerve, unspecified side, initial encounter
  • S04.70XD - Injury of accessory nerve, unspecified side, subsequent encounter
  • S04.70XS - Injury of accessory nerve, unspecified side, sequela
  • S04.71 - Injury of accessory nerve, right side
  • S04.71XA - Injury of accessory nerve, right side, initial encounter
  • S04.71XD - Injury of accessory nerve, right side, subsequent encounter
  • S04.71XS - Injury of accessory nerve, right side, sequela
  • S04.72 - Injury of accessory nerve, left side
  • S04.72XA - Injury of accessory nerve, left side, initial encounter
  • S04.72XD - Injury of accessory nerve, left side, subsequent encounter
  • S04.72XS - Injury of accessory nerve, left side, sequela
  • S04.8 - Injury of other cranial nerves
  • S04.81 - Injury of olfactory [1st ] nerve
  • S04.811 - Injury of olfactory [1st ] nerve, right side
  • S04.811A - Injury of olfactory [1st ] nerve, right side, initial encounter
  • S04.811D - Injury of olfactory [1st ] nerve, right side, subsequent encounter
  • S04.811S - Injury of olfactory [1st ] nerve, right side, sequela
  • S04.812 - Injury of olfactory [1st ] nerve, left side
  • S04.812A - Injury of olfactory [1st ] nerve, left side, initial encounter
  • S04.812D - Injury of olfactory [1st ] nerve, left side, subsequent encounter
  • S04.812S - Injury of olfactory [1st ] nerve, left side, sequela
  • S04.819 - Injury of olfactory [1st ] nerve, unspecified side
  • S04.819A - Injury of olfactory [1st ] nerve, unspecified side, initial encounter
  • S04.819D - Injury of olfactory [1st ] nerve, unspecified side, subsequent encounter
  • S04.819S - Injury of olfactory [1st ] nerve, unspecified side, sequela
  • S04.89 - Injury of other cranial nerves
  • S04.891 - Injury of other cranial nerves, right side
  • S04.891A - Injury of other cranial nerves, right side, initial encounter
  • S04.891D - Injury of other cranial nerves, right side, subsequent encounter
  • S04.891S - Injury of other cranial nerves, right side, sequela
  • S04.892 - Injury of other cranial nerves, left side
  • S04.892A - Injury of other cranial nerves, left side, initial encounter
  • S04.892D - Injury of other cranial nerves, left side, subsequent encounter
  • S04.892S - Injury of other cranial nerves, left side, sequela
  • S04.899 - Injury of other cranial nerves, unspecified side
  • S04.899A - Injury of other cranial nerves, unspecified side, initial encounter
  • S04.899D - Injury of other cranial nerves, unspecified side, subsequent encounter
  • S04.899S - Injury of other cranial nerves, unspecified side, sequela
  • S04.9 - Injury of unspecified cranial nerve
  • S04.9XXA - Injury of unspecified cranial nerve, initial encounter
  • S04.9XXD - Injury of unspecified cranial nerve, subsequent encounter
  • S04.9XXS - Injury of unspecified cranial nerve, sequela

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code S04:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • The selection of side should be based on the side of the body being affected

Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • any associated intracranial injury S06

Code Also

Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • any associated:
  • open wound of head S01
  • skull fracture S02

7th Character Note

7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • The appropriate 7th character is to be added to each code from category S04

7th Character

7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Injuries to the head (S00-S09)
      • Injury of cranial nerve (S04)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Peripheral Nerve Disorders

Your peripheral nerves are the ones outside your brain and spinal cord. Like static on a telephone line, peripheral nerve disorders distort or interrupt the messages between the brain and the rest of the body.

There are more than 100 kinds of peripheral nerve disorders. They can affect one nerve or many nerves. Some are the result of other diseases, like diabetic nerve problems. Others, like Guillain-Barre syndrome, happen after a virus infection. Still others are from nerve compression, like carpal tunnel syndrome or thoracic outlet syndrome. In some cases, like complex regional pain syndrome and brachial plexus injuries, the problem begins after an injury. Some people are born with peripheral nerve disorders.

Symptoms often start gradually, and then get worse. They include

  • Numbness
  • Pain
  • Burning or tingling
  • Muscle weakness
  • Sensitivity to touch

Treatment aims to treat any underlying problem, reduce pain and control symptoms.

NIH: National Institute of Neurological Disorders and Stroke


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