Injury of nerves at lower leg level

Instructional notes

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers 7th character use and coding of injuries, fractures, burns, drug and toxic effects, abuse and neglect, and complications of care (S00-T88).

• Application of 7th Characters in Chapter 19 (page 77)
• Coding of Injuries (page 78)
• Coding of Traumatic Fractures (page 79)
• Coding of Burns and Corrosions (page 80)
• Adverse Effects, Poisoning, Underdosing and Toxic Effects (page 82)
• Adult and child abuse, neglect and other maltreatment (page 85)
• Complications of care (page 85)

Read Section I.C.19 (page 77)

All codes under S84

S84 can't be used on a claim. Pick a billable code below; grey headings group them.

• S84.0Injury of tibial nerve at lower leg level
• S84.00Injury of tibial nerve at lower leg level, unspecified leg
• S84.00XAInjury of tibial nerve at lower leg level, unspecified leg, initial encounter
• S84.00XDInjury of tibial nerve at lower leg level, unspecified leg, subsequent encounter
• S84.00XSInjury of tibial nerve at lower leg level, unspecified leg, sequela
• S84.01Injury of tibial nerve at lower leg level, right leg
• S84.01XAInjury of tibial nerve at lower leg level, right leg, initial encounter
• S84.01XDInjury of tibial nerve at lower leg level, right leg, subsequent encounter
• S84.01XSInjury of tibial nerve at lower leg level, right leg, sequela
• S84.02Injury of tibial nerve at lower leg level, left leg
• S84.02XAInjury of tibial nerve at lower leg level, left leg, initial encounter
• S84.02XDInjury of tibial nerve at lower leg level, left leg, subsequent encounter
• S84.02XSInjury of tibial nerve at lower leg level, left leg, sequela
• S84.1Injury of peroneal nerve at lower leg level
• S84.10Injury of peroneal nerve at lower leg level, unspecified leg
• S84.10XAInjury of peroneal nerve at lower leg level, unspecified leg, initial encounter
• S84.10XDInjury of peroneal nerve at lower leg level, unspecified leg, subsequent encounter
• S84.10XSInjury of peroneal nerve at lower leg level, unspecified leg, sequela
• S84.11Injury of peroneal nerve at lower leg level, right leg
• S84.11XAInjury of peroneal nerve at lower leg level, right leg, initial encounter
• S84.11XDInjury of peroneal nerve at lower leg level, right leg, subsequent encounter
• S84.11XSInjury of peroneal nerve at lower leg level, right leg, sequela
• S84.12Injury of peroneal nerve at lower leg level, left leg
• S84.12XAInjury of peroneal nerve at lower leg level, left leg, initial encounter
• S84.12XDInjury of peroneal nerve at lower leg level, left leg, subsequent encounter
• S84.12XSInjury of peroneal nerve at lower leg level, left leg, sequela
• S84.2Injury of cutaneous sensory nerve at lower leg level
• S84.20Injury of cutaneous sensory nerve at lower leg level, unspecified leg
• S84.20XAInjury of cutaneous sensory nerve at lower leg level, unspecified leg, initial encounter
• S84.20XDInjury of cutaneous sensory nerve at lower leg level, unspecified leg, subsequent encounter
• S84.20XSInjury of cutaneous sensory nerve at lower leg level, unspecified leg, sequela
• S84.21Injury of cutaneous sensory nerve at lower leg level, right leg
• S84.21XAInjury of cutaneous sensory nerve at lower leg level, right leg, initial encounter
• S84.21XDInjury of cutaneous sensory nerve at lower leg level, right leg, subsequent encounter
• S84.21XSInjury of cutaneous sensory nerve at lower leg level, right leg, sequela
• S84.22Injury of cutaneous sensory nerve at lower leg level, left leg
• S84.22XAInjury of cutaneous sensory nerve at lower leg level, left leg, initial encounter
• S84.22XDInjury of cutaneous sensory nerve at lower leg level, left leg, subsequent encounter
• S84.22XSInjury of cutaneous sensory nerve at lower leg level, left leg, sequela
• S84.8Injury of other nerves at lower leg level
• S84.80Injury of other nerves at lower leg level
• S84.801Injury of other nerves at lower leg level, right leg
• S84.801AInjury of other nerves at lower leg level, right leg, initial encounter
• S84.801DInjury of other nerves at lower leg level, right leg, subsequent encounter
• S84.801SInjury of other nerves at lower leg level, right leg, sequela
• S84.802Injury of other nerves at lower leg level, left leg
• S84.802AInjury of other nerves at lower leg level, left leg, initial encounter
• S84.802DInjury of other nerves at lower leg level, left leg, subsequent encounter
• S84.802SInjury of other nerves at lower leg level, left leg, sequela
• S84.809Injury of other nerves at lower leg level, unspecified leg
• S84.809AInjury of other nerves at lower leg level, unspecified leg, initial encounter
• S84.809DInjury of other nerves at lower leg level, unspecified leg, subsequent encounter
• S84.809SInjury of other nerves at lower leg level, unspecified leg, sequela
• S84.9Injury of unspecified nerve at lower leg level
• S84.90Injury of unspecified nerve at lower leg level, unspecified leg
• S84.90XAInjury of unspecified nerve at lower leg level, unspecified leg, initial encounter
• S84.90XDInjury of unspecified nerve at lower leg level, unspecified leg, subsequent encounter
• S84.90XSInjury of unspecified nerve at lower leg level, unspecified leg, sequela
• S84.91Injury of unspecified nerve at lower leg level, right leg
• S84.91XAInjury of unspecified nerve at lower leg level, right leg, initial encounter
• S84.91XDInjury of unspecified nerve at lower leg level, right leg, subsequent encounter
• S84.91XSInjury of unspecified nerve at lower leg level, right leg, sequela
• S84.92Injury of unspecified nerve at lower leg level, left leg
• S84.92XAInjury of unspecified nerve at lower leg level, left leg, initial encounter
• S84.92XDInjury of unspecified nerve at lower leg level, left leg, subsequent encounter
• S84.92XSInjury of unspecified nerve at lower leg level, left leg, sequela

S84 MS-DRGs

As the principal diagnosis, the billable codes under S84 group to these 10 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

• DRG 073 Cranial and Peripheral Nerve Disorders with MCC (15 of 45 codes)
• DRG 074 Cranial and Peripheral Nerve Disorders without MCC (15 of 45 codes)
• DRG 091 Other Disorders of Nervous System with MCC (15 of 45 codes)
• DRG 092 Other Disorders of Nervous System with CC (15 of 45 codes)
• DRG 093 Other Disorders of Nervous System without CC/MCC (15 of 45 codes)
• DRG 949 Aftercare with CC/MCC (15 of 45 codes)
• DRG 950 Aftercare without CC/MCC (15 of 45 codes)
• DRG 963 Other Multiple Significant Trauma with MCC (15 of 45 codes)
• DRG 964 Other Multiple Significant Trauma with CC (15 of 45 codes)
• DRG 965 Other Multiple Significant Trauma without CC/MCC (15 of 45 codes)

Other codes that refer to S84

Notes on these codes point to S84.

• S74 Excludes2: injury of nerves at lower leg level (S84.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.