S55.999A
✓ BillableOther specified injury of unspecified blood vessel at forearm level, unspecified arm, initial encounter
Injury, poisoning and certain other consequences of external causes (S00-T88)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • injury of blood vessels at wrist and hand level (S65.-)
- • injury of brachial vessels (S45.1-S45.2)
Clinical Description
ICD-10-CM code S55.999A represents other specified injury of unspecified blood vessel at forearm level, unspecified arm, 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 S55.999A?
ICD-10-CM code S55.999A is "Other specified injury of unspecified blood vessel at forearm level, unspecified arm, initial encounter". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).
Is S55.999A a billable ICD-10 code?
Yes, S55.999A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Can S55.999A be coded with other codes?
S55.999A has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in S55.999
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)