2018 ICD-10-CM Diagnosis Code S04.21XA

Injury of trochlear nerve, right side, initial encounter

The following code(s) above S04.21XA contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to S04.21XA:
  • S00-T88
    2018 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    Note
    • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • S00-S09
    2018 ICD-10-CM Range S00-S09

    Injuries to the head

    Code Also
    • for any associated infection
    Includes
    • 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
    Type 2 Excludes
    • 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)
    Injuries to the head
  • S04
    ICD-10-CM Diagnosis Code S04

    Injury of cranial nerve

      2016 2017 2018 Non-Billable/Non-Specific Code
    Applicable To
    • The selection of side should be based on the side of the body being affected
    Code First
    • any associated intracranial injury (S06.-)
    Code Also
    • any associated:
    • open wound of head (S01.-)
    • skull fracture (S02.-)
    Injury of cranial nerve
  • S04.2
    ICD-10-CM Diagnosis Code S04.2

    Injury of trochlear nerve

      2016 2017 2018 Non-Billable/Non-Specific Code
    Applicable To
    • Injury of 4th cranial nerve
    Injury of trochlear nerve
Approximate Synonyms ICD-10-CM S04.21XA is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert S04.21XA to ICD-9-CM

Code History
ICD-10-CM Codes Adjacent To S04.21XA
S04.12 Injury of oculomotor nerve, left side
S04.12XA …… initial encounter
S04.12XD …… subsequent encounter
S04.12XS …… sequela
S04.2 Injury of trochlear nerve
S04.20 Injury of trochlear nerve, unspecified side
S04.20XA …… initial encounter
S04.20XD …… subsequent encounter
S04.20XS …… sequela
S04.21 Injury of trochlear nerve, right side
S04.21XA …… initial encounter
S04.21XD …… subsequent encounter
S04.21XS …… sequela
S04.22 Injury of trochlear nerve, left side
S04.22XA …… initial encounter
S04.22XD …… subsequent encounter
S04.22XS …… sequela
S04.3 Injury of trigeminal nerve
S04.30 Injury of trigeminal nerve, unspecified side
S04.30XA …… initial encounter
S04.30XD …… subsequent encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.