2026 ICD-10-CM Diagnosis Code S64.40XSInjury of digital nerve of unspecified finger, sequela
S64.40XS is a billable ICD-10-CM diagnosis code for injury of digital nerve of unspecified finger, 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
S64.40XS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Closed injury, common digital nerve
- Closed injury, digital nerve in finger
- Injury of digital nerve
- Injury of digital nerve of finger of left hand
- Injury of digital nerve of finger of right hand
- Laceration of digital nerve in finger
- Laceration of nerve
- Laceration of nerve of upper extremity
- Open injury, common digital nerve
- Open injury, digital nerve in finger
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
Finger Injuries and Disorders
You use your fingers and thumbs to do everything from grasping objects to playing musical instruments to typing. When there is something wrong with them, it can make life difficult. Common problems include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S64.40XS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S64.40XSOverview
Is S64.40XS (Injury of digital nerve of unspecified finger) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report injury of digital nerve of unspecified finger, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S64.40XS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the injury of digital nerve of unspecified finger itself has resolved, not the original event.
Is S64.40XS 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 digital nerve of unspecified finger, sequela on inpatient claims.
What is the ICD-9 equivalent of S64.40XS?
Under the General Equivalence Mappings, injury of digital nerve of unspecified finger, 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.
