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S04.2

Non-billable

Injury of trochlear nerve

Injury of trochlear nerve

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

S00-S09

Parent Code

S04

Child Codes

3

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Injury of 4th cranial nerve

Includes

Conditions included under this code

  • injuries of ear
  • injuries of eye
  • injuries of face [any part]
  • injuries of gum
  • injuries of jaw
  • injuries of oral cavity
  • injuries of palate
  • injuries of periocular area
  • injuries of scalp
  • injuries of temporomandibular joint area
  • injuries of tongue
  • injuries of tooth

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

Excludes 2

Conditions not included here, but the patient may have both

  • burns and corrosions (T20-T32)
  • effects of foreign body in ear (T16)
  • effects of foreign body in larynx (T17.3)
  • effects of foreign body in mouth NOS (T18.0)
  • effects of foreign body in nose (T17.0-T17.1)
  • effects of foreign body in pharynx (T17.2)
  • effects of foreign body on external eye (T15.-)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)

Code First

The underlying condition must be sequenced before this code

  • any associated intracranial injury (S06.-)

Use Additional Code

Additional codes that should follow this code

  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be required; sequencing depends on circumstances

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

Child Codes (3)

S04.20

Injury of trochlear nerve, unspecified side

S04.21

Injury of trochlear nerve, right side

S04.22

Injury of trochlear nerve, left side

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code S04.2?

ICD-10-CM code S04.2 represents "Injury of trochlear nerve". It is a non-billable header code — use a more specific child code for billing purposes.

Is S04.2 a billable code?

No, S04.2 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 3 child codes under S04.2.

What chapter is S04.2 in?

S04.2 is in Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (codes S00-T88).

What codes cannot be used with S04.2?

S04.2 has Excludes1 notes indicating codes that cannot be used together with it, including: birth trauma (P10-P15); obstetric trauma (O70-O71).

What are the subcategories under S04.2?

S04.2 has 3 child codes, including: S04.20 (Injury of trochlear nerve, unspecified side), S04.21 (Injury of trochlear nerve, right side), S04.22 (Injury of trochlear nerve, left side).

Are additional codes required with S04.2?

Yes, when using S04.2 you should also code: code to identify any retained foreign body, if applicable (Z18.-).

What are the UMLS CUIs for S04.2?

S04.2 is linked to 2 UMLS Concept Unique Identifiers: C0161405, C2831704. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.