2026 ICD-10-CM Diagnosis Code S45.112SLaceration of brachial artery, left side, sequela
S45.112S is a billable ICD-10-CM diagnosis code for laceration of brachial artery, left side, 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) and groups to MS-DRG 299 through 301. The code is exempt from POA reporting. Coders also document this condition as injury of brachial artery. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
S45.112S 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.
- Injury of brachial artery
- Laceration of left brachial artery
- Left brachial artery injury
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of blood vessels at shoulder and upper arm level (S45). 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.
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Convert S45.112S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S45.112SOverview
Is S45.112S (Laceration of brachial artery, left side) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report laceration of brachial artery, left side, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S45.112S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the laceration of brachial artery, left side itself has resolved, not the original event.
What MS-DRG does S45.112S group to?
When laceration of brachial artery, left side, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 299, 300, 301, with relative weights from 0.7197 to 1.6327 depending on complications. Higher weights mean higher Medicare reimbursement.
Is S45.112S 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 laceration of brachial artery, left side, sequela on inpatient claims.
What is the ICD-9 equivalent of S45.112S?
Under the General Equivalence Mappings, laceration of brachial artery, left side, sequela converts to ICD-9-CM 908.3 (late eff inj periph vess). 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.
