What does ICD-10 code S84.91 mean?

ICD-10 code S84.91 is the standardized code used for injury of unspecified nerve at lower leg level, right leg in medical records and coding systems.

When is ICD-10 code S84.91 used?

Doctors, hospitals, and insurers may use ICD-10 code S84.91 when recording injury of unspecified nerve at lower leg level, right leg in a standardized format.

Does ICD-10 code S84.91 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10BillableValid for clinical use

ICD-10 Code S84.91: Injury of unspecified nerve at lower leg level, right leg

Name: ICD-10 Code S84.91: Injury of unspecified nerve at lower leg level, right leg
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:39:09.926Z

S84.91 is a billable ICD-10 diagnosis code used to classify Injury of unspecified nerve at lower leg level, right leg in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

When is it used?

May be used when a clinician documents injury of unspecified nerve at lower leg level, right leg in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter

19Injury, poisoning and certain other consequences of external causes (S00-T88)

block

S80-S89Injuries to the knee and lower leg

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Emergency Medicine SpecialistOrthopedic Specialist

Sibling codes

S84.90Injury of unspecified nerve at lower leg level, unspecified legbillable S84.92Injury of unspecified nerve at lower leg level, left legbillable

Coding guidelines

Common synonyms

Injury of unspecified nerve at lower leg level, right legInjury of nerve at lower leg level, right leg

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.