2026 ICD-10-CM Diagnosis Code S54.12XSInjury of median nerve at forearm level, left arm, sequela
S54.12XS is a billable ICD-10-CM diagnosis code for injury of median nerve at forearm level, left 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
S54.12XS 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 forearm level (S54). 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
Arm Injuries and Disorders
Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S54.12XS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S54.12XSOverview
Is S54.12XS (Injury of median nerve at forearm level, left arm) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report injury of median nerve at forearm level, left arm, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S54.12XS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the injury of median nerve at forearm level, left arm itself has resolved, not the original event.
Is S54.12XS 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 median nerve at forearm level, left arm, sequela on inpatient claims.
What is the ICD-9 equivalent of S54.12XS?
Under the General Equivalence Mappings, injury of median nerve at forearm level, left 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.
