2026 ICD-10-CM Diagnosis Code S56.922ALaceration of unspecified muscles, fascia and tendons at forearm level, left arm, initial encounter
S56.922A is a billable ICD-10-CM diagnosis code for laceration of unspecified muscles, fascia and tendons at forearm level, left arm, 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 564 through 566, 963 through 965. Coders also document this condition as disorder of tendon of left forearm. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Open wounds to limbs, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Disorder of tendon of left forearm
- Laceration of left forearm
- Laceration of muscle of left forearm
- Laceration of tendon of forearm
- Laceration of tendon of left forearm
- Open wound of muscle of forearm
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of muscle, fascia and tendon at forearm level (S56). 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 S56.922A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S56.922AOverview
Is S56.922A a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report laceration of unspecified muscles, fascia and tendons at forearm level, left arm, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S56.922A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for laceration of unspecified muscles, fascia and tendons at forearm level, left arm, such as an emergency visit or first evaluation.
What MS-DRG does S56.922A group to?
When laceration of unspecified muscles, fascia and tendons at forearm level, left arm, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, 963, 964, 965, with relative weights from 0.7493 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S56.922A?
Under the General Equivalence Mappings, laceration of unspecified muscles, fascia and tendons at forearm level, left arm, initial encounter converts to ICD-9-CM 881.20 (open wnd forearm w tendn). 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.
