ICD-10-CM 2027 diagnosis code

S84Injury of nerves at lower leg level

Not billable — use a more specific code

S84 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S84

S84 is the ICD-10-CM diagnosis code for injury of nerves at lower leg level. It belongs to block S80-S89 (injuries to the knee and lower leg) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: S84.0 (level), S84.1 (level), S84.2 (level), S84.8 (level) and S84.9 (level).

The conditions in its Excludes2 note aren't part of S84, but may be coded alongside it if the patient has both: injury of nerves at ankle and foot level (S94.-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under S84

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

injury of nerves at ankle and foot level (S94.-)

Code alsoTwo codes may be needed; sequencing depends on circumstances

any associated open wound (S81.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to S84.

Broader instructions also apply from S80-S89 Injuries to the knee and lower leg and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Codes whose notes reference S84

S74Excludes2

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about S84

Is S84 billable?: No. S84 is a header code. Report one of its more specific subcodes instead.