S84.90XA

Injury of unspecified nerve at lower leg level, unspecified leg, initial encounter

Billable / specific

S84.90XA is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from S84)

  • 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
  • Note: The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Excludes2

Not included here — may be reported together when both conditions exist.

  • birth trauma (P10-P15) (from S84)
  • obstetric trauma (O70-O71) (from S84)
  • burns and corrosions (T20-T32) (from S84)
  • frostbite (T33-T34) (from S84)
  • injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99) (from S84)
  • insect bite or sting, venomous (T63.4) (from S84)
  • injury of nerves at ankle and foot level (S94.-) (from S84)

Use additional code

Add a code to identify the following, if applicable.

  • code to identify any retained foreign body, if applicable (Z18.-) (from S84)

Code also

An additional code may be needed.

  • any associated open wound (S81.-) (from S84)

7th character

The 7th character values that apply to this code (defined at S84). Use the placeholder "X" for missing positions.

CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela

Parent code

  • S84.90Injury of unspecified nerve at lower leg level, unspecified legNeeds 7th char

Related codes

  • S84.90XDInjury of unspecified nerve at lower leg level, unspecified leg, subsequent encounterBillable
  • S84.90XSInjury of unspecified nerve at lower leg level, unspecified leg, sequelaBillable

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