2026 ICD-10-CM Diagnosis Code S89.92XAUnspecified injury of left lower leg, initial encounter
S89.92XA is a billable ICD-10-CM diagnosis code for unspecified injury of left lower leg, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 913 through 914, 963 through 965. Coders also document this condition as injury of articular cartilage of left knee joint. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other unspecified injury.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Injury of articular cartilage of left knee joint
- Injury of left knee
- Injury of left leg
- Injury of left lower leg
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Other and unspecified injuries of lower leg (S89). 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
Leg Injuries and Disorders
Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures (broken bones).
Read the full article at MedlinePlus
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Convert S89.92XA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S89.92XAOverview
Is S89.92XA (Unspecified injury of left lower leg) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified injury of left lower leg, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S89.92XA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified injury of left lower leg, such as an emergency visit or first evaluation.
What MS-DRG does S89.92XA group to?
When unspecified injury of left lower leg, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 913, 914, 963, 964, 965, with relative weights from 0.8855 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S89.92XA?
Under the General Equivalence Mappings, unspecified injury of left lower leg, initial encounter converts to ICD-9-CM 959.7 (lower leg injury NOS). 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.
