Injury of nerves at wrist and hand 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 S64

S64 can't be used on a claim. Pick a billable code below; grey headings group them.

• S64.0Injury of ulnar nerve at wrist and hand level
• S64.00Injury of ulnar nerve at wrist and hand level of unspecified arm
• S64.00XAInjury of ulnar nerve at wrist and hand level of unspecified arm, initial encounter
• S64.00XDInjury of ulnar nerve at wrist and hand level of unspecified arm, subsequent encounter
• S64.00XSInjury of ulnar nerve at wrist and hand level of unspecified arm, sequela
• S64.01Injury of ulnar nerve at wrist and hand level of right arm
• S64.01XAInjury of ulnar nerve at wrist and hand level of right arm, initial encounter
• S64.01XDInjury of ulnar nerve at wrist and hand level of right arm, subsequent encounter
• S64.01XSInjury of ulnar nerve at wrist and hand level of right arm, sequela
• S64.02Injury of ulnar nerve at wrist and hand level of left arm
• S64.02XAInjury of ulnar nerve at wrist and hand level of left arm, initial encounter
• S64.02XDInjury of ulnar nerve at wrist and hand level of left arm, subsequent encounter
• S64.02XSInjury of ulnar nerve at wrist and hand level of left arm, sequela
• S64.1Injury of median nerve at wrist and hand level
• S64.10Injury of median nerve at wrist and hand level of unspecified arm
• S64.10XAInjury of median nerve at wrist and hand level of unspecified arm, initial encounter
• S64.10XDInjury of median nerve at wrist and hand level of unspecified arm, subsequent encounter
• S64.10XSInjury of median nerve at wrist and hand level of unspecified arm, sequela
• S64.11Injury of median nerve at wrist and hand level of right arm
• S64.11XAInjury of median nerve at wrist and hand level of right arm, initial encounter
• S64.11XDInjury of median nerve at wrist and hand level of right arm, subsequent encounter
• S64.11XSInjury of median nerve at wrist and hand level of right arm, sequela
• S64.12Injury of median nerve at wrist and hand level of left arm
• S64.12XAInjury of median nerve at wrist and hand level of left arm, initial encounter
• S64.12XDInjury of median nerve at wrist and hand level of left arm, subsequent encounter
• S64.12XSInjury of median nerve at wrist and hand level of left arm, sequela
• S64.2Injury of radial nerve at wrist and hand level
• S64.20Injury of radial nerve at wrist and hand level of unspecified arm
• S64.20XAInjury of radial nerve at wrist and hand level of unspecified arm, initial encounter
• S64.20XDInjury of radial nerve at wrist and hand level of unspecified arm, subsequent encounter
• S64.20XSInjury of radial nerve at wrist and hand level of unspecified arm, sequela
• S64.21Injury of radial nerve at wrist and hand level of right arm
• S64.21XAInjury of radial nerve at wrist and hand level of right arm, initial encounter
• S64.21XDInjury of radial nerve at wrist and hand level of right arm, subsequent encounter
• S64.21XSInjury of radial nerve at wrist and hand level of right arm, sequela
• S64.22Injury of radial nerve at wrist and hand level of left arm
• S64.22XAInjury of radial nerve at wrist and hand level of left arm, initial encounter
• S64.22XDInjury of radial nerve at wrist and hand level of left arm, subsequent encounter
• S64.22XSInjury of radial nerve at wrist and hand level of left arm, sequela
• S64.3Injury of digital nerve of thumb
• S64.30Injury of digital nerve of unspecified thumb
• S64.30XAInjury of digital nerve of unspecified thumb, initial encounter
• S64.30XDInjury of digital nerve of unspecified thumb, subsequent encounter
• S64.30XSInjury of digital nerve of unspecified thumb, sequela
• S64.31Injury of digital nerve of right thumb
• S64.31XAInjury of digital nerve of right thumb, initial encounter
• S64.31XDInjury of digital nerve of right thumb, subsequent encounter
• S64.31XSInjury of digital nerve of right thumb, sequela
• S64.32Injury of digital nerve of left thumb
• S64.32XAInjury of digital nerve of left thumb, initial encounter
• S64.32XDInjury of digital nerve of left thumb, subsequent encounter
• S64.32XSInjury of digital nerve of left thumb, sequela
• S64.4Injury of digital nerve of other and unspecified finger
• S64.40Injury of digital nerve of unspecified finger
• S64.40XAInjury of digital nerve of unspecified finger, initial encounter
• S64.40XDInjury of digital nerve of unspecified finger, subsequent encounter
• S64.40XSInjury of digital nerve of unspecified finger, sequela
• S64.49Injury of digital nerve of other finger
• S64.490Injury of digital nerve of right index finger
• S64.490AInjury of digital nerve of right index finger, initial encounter
• S64.490DInjury of digital nerve of right index finger, subsequent encounter
• S64.490SInjury of digital nerve of right index finger, sequela
• S64.491Injury of digital nerve of left index finger
• S64.491AInjury of digital nerve of left index finger, initial encounter
• S64.491DInjury of digital nerve of left index finger, subsequent encounter
• S64.491SInjury of digital nerve of left index finger, sequela
• S64.492Injury of digital nerve of right middle finger
• S64.492AInjury of digital nerve of right middle finger, initial encounter
• S64.492DInjury of digital nerve of right middle finger, subsequent encounter
• S64.492SInjury of digital nerve of right middle finger, sequela
• S64.493Injury of digital nerve of left middle finger
• S64.493AInjury of digital nerve of left middle finger, initial encounter
• S64.493DInjury of digital nerve of left middle finger, subsequent encounter
• S64.493SInjury of digital nerve of left middle finger, sequela
• S64.494Injury of digital nerve of right ring finger
• S64.494AInjury of digital nerve of right ring finger, initial encounter
• S64.494DInjury of digital nerve of right ring finger, subsequent encounter
• S64.494SInjury of digital nerve of right ring finger, sequela
• S64.495Injury of digital nerve of left ring finger
• S64.495AInjury of digital nerve of left ring finger, initial encounter
• S64.495DInjury of digital nerve of left ring finger, subsequent encounter
• S64.495SInjury of digital nerve of left ring finger, sequela
• S64.496Injury of digital nerve of right little finger
• S64.496AInjury of digital nerve of right little finger, initial encounter
• S64.496DInjury of digital nerve of right little finger, subsequent encounter
• S64.496SInjury of digital nerve of right little finger, sequela
• S64.497Injury of digital nerve of left little finger
• S64.497AInjury of digital nerve of left little finger, initial encounter
• S64.497DInjury of digital nerve of left little finger, subsequent encounter
• S64.497SInjury of digital nerve of left little finger, sequela
• S64.498Injury of digital nerve of other finger
• S64.498AInjury of digital nerve of other finger, initial encounter
• S64.498DInjury of digital nerve of other finger, subsequent encounter
• S64.498SInjury of digital nerve of other finger, sequela
• S64.8Injury of other nerves at wrist and hand level
• S64.8XInjury of other nerves at wrist and hand level
• S64.8X1Injury of other nerves at wrist and hand level of right arm
• S64.8X1AInjury of other nerves at wrist and hand level of right arm, initial encounter
• S64.8X1DInjury of other nerves at wrist and hand level of right arm, subsequent encounter
• S64.8X1SInjury of other nerves at wrist and hand level of right arm, sequela
• S64.8X2Injury of other nerves at wrist and hand level of left arm
• S64.8X2AInjury of other nerves at wrist and hand level of left arm, initial encounter
• S64.8X2DInjury of other nerves at wrist and hand level of left arm, subsequent encounter
• S64.8X2SInjury of other nerves at wrist and hand level of left arm, sequela
• S64.8X9Injury of other nerves at wrist and hand level of unspecified arm
• S64.8X9AInjury of other nerves at wrist and hand level of unspecified arm, initial encounter
• S64.8X9DInjury of other nerves at wrist and hand level of unspecified arm, subsequent encounter
• S64.8X9SInjury of other nerves at wrist and hand level of unspecified arm, sequela
• S64.9Injury of unspecified nerve at wrist and hand level
• S64.90Injury of unspecified nerve at wrist and hand level of unspecified arm
• S64.90XAInjury of unspecified nerve at wrist and hand level of unspecified arm, initial encounter
• S64.90XDInjury of unspecified nerve at wrist and hand level of unspecified arm, subsequent encounter
• S64.90XSInjury of unspecified nerve at wrist and hand level of unspecified arm, sequela
• S64.91Injury of unspecified nerve at wrist and hand level of right arm
• S64.91XAInjury of unspecified nerve at wrist and hand level of right arm, initial encounter
• S64.91XDInjury of unspecified nerve at wrist and hand level of right arm, subsequent encounter
• S64.91XSInjury of unspecified nerve at wrist and hand level of right arm, sequela
• S64.92Injury of unspecified nerve at wrist and hand level of left arm
• S64.92XAInjury of unspecified nerve at wrist and hand level of left arm, initial encounter
• S64.92XDInjury of unspecified nerve at wrist and hand level of left arm, subsequent encounter
• S64.92XSInjury of unspecified nerve at wrist and hand level of left arm, sequela

S64 MS-DRGs

As the principal diagnosis, the billable codes under S64 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 (28 of 84 codes)
• DRG 074 Cranial and Peripheral Nerve Disorders without MCC (28 of 84 codes)
• DRG 091 Other Disorders of Nervous System with MCC (28 of 84 codes)
• DRG 092 Other Disorders of Nervous System with CC (28 of 84 codes)
• DRG 093 Other Disorders of Nervous System without CC/MCC (28 of 84 codes)
• DRG 949 Aftercare with CC/MCC (28 of 84 codes)
• DRG 950 Aftercare without CC/MCC (28 of 84 codes)
• DRG 963 Other Multiple Significant Trauma with MCC (28 of 84 codes)
• DRG 964 Other Multiple Significant Trauma with CC (28 of 84 codes)
• DRG 965 Other Multiple Significant Trauma without CC/MCC (28 of 84 codes)

Other codes that refer to S64

Notes on these codes point to S64.

• S54 Excludes2: injury of nerves at wrist and hand level (S64.-)

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.