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ICD-10/S64.90

S64.90 ICD-10-CM Code: Injury of unspecified nerve at wrist and hand level of unspecified arm

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Injury of unspecified nerve at wrist and hand level of unspecified arm is a non-billable ICD-10-CM category code (S64.90). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S64.90 in the official ICD-10-CM tabular list.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)

Code Also

Additional codes that may be required to fully describe the encounter.

  • any associated open wound (S61.-)

Frequently Asked Questions (FAQ) & Clinical Guidance

Can S64.90 be billed directly?

No. S64.90 (Injury of unspecified nerve at wrist and hand level of unspecified arm) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does S64.90 require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S64.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S64.90 in its code family, with their registry titles.

  • S64.8X9 — Injury of other nerves at wrist and hand level of unspecified arm
  • S64.8X9A — Injury of other nerves at wrist and hand level of unspecified arm, initial encounter
  • S64.8X9D — Injury of other nerves at wrist and hand level of unspecified arm, subsequent encounter
  • S64.8X9S — Injury of other nerves at wrist and hand level of unspecified arm, sequela
  • S64.9 — Injury of unspecified nerve at wrist and hand level
  • S64.90XA — Injury of unspecified nerve at wrist and hand level of unspecified arm, initial encounter
  • S64.90XD — Injury of unspecified nerve at wrist and hand level of unspecified arm, subsequent encounter
  • S64.90XS — Injury of unspecified nerve at wrist and hand level of unspecified arm, sequela
  • S64.91 — Injury of unspecified nerve at wrist and hand level of right arm
  • S64.91XA — Injury of unspecified nerve at wrist and hand level of right arm, initial encounter

View all codes in the S64 family