S56.412A
✓ BillableStrain of extensor muscle, fascia and tendon of left index finger at forearm level, initial encounter
Injury, poisoning and certain other consequences of external causes (S00-T88)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • injury of muscle, fascia and tendon at or below wrist (S66.-)
- • sprain of joints and ligaments of elbow (S53.4-)
Clinical Description
ICD-10-CM code S56.412A represents strain of extensor muscle, fascia and tendon of left index finger at forearm level, initial encounter. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 8-character code at the 7th level of specificity. This is the most specific code available in this subcategory.
Frequently Asked Questions
What is ICD-10 code S56.412A?
ICD-10-CM code S56.412A is "Strain of extensor muscle, fascia and tendon of left index finger at forearm level, initial encounter". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).
Is S56.412A a billable ICD-10 code?
Yes, S56.412A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Can S56.412A be coded with other codes?
S56.412A has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in S56.412
Other codes in the same category that may be relevant for differential coding:
🧪 Validate Combinations
Add S56.412A to the Excludes Checker to validate against your full code list.
Open in Checker →Code Information
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)