2026 ICD-10-CM Diagnosis Code S64.91XSInjury of unspecified nerve at wrist and hand level of right arm, sequela
S64.91XS is a billable ICD-10-CM diagnosis code for injury of unspecified nerve at wrist and hand level of right arm, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
S64.91XS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of nerves at wrist and hand level (S64). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Hand Injuries and Disorders
No matter how old you are or what you do for a living, you are always using your hands. When there is something wrong with them, you may not be able to do your regular activities.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S64.91XS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S64.91XSOverview
Is S64.91XS a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report injury of unspecified nerve at wrist and hand level of right arm, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S64.91XS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the injury of unspecified nerve at wrist and hand level of right arm itself has resolved, not the original event.
Is S64.91XS exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for injury of unspecified nerve at wrist and hand level of right arm, sequela on inpatient claims.
What is the ICD-9 equivalent of S64.91XS?
Under the General Equivalence Mappings, injury of unspecified nerve at wrist and hand level of right arm, sequela converts to ICD-9-CM 907.4 (lt eff nerv inj shld/arm). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
