ICD-10-CM Diagnosis Code S54.0

Injury of ulnar nerve NOS

The appropriate 7th character is to be added to each code from category S54

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

any associated open wound (S51.-)

birth trauma (P10-P15)

obstetric trauma (O70-O71)

injury of nerves at wrist and hand level (S64.-)

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

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.