Non-Billable / Non-Specific Code
ICD-10-CM S04.2 is the diagnosis code for Injury of trochlear nerve. This code falls under the section "Injuries to the head" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where S04.2 sits in the ICD-10-CM classification helps ensure proper coding:
No, S04.2 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
S04.2 is the ICD-10-CM diagnosis code for "Injury of trochlear nerve". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of S04.2 is S04 ("Injury of cranial nerve"). S04.2 provides a more specific classification within this category.
S04.2 is located in Section S00-S09 — "Injuries to the head" within Chapter 19 of the ICD-10-CM Tabular List.
S04.2 has 3 sub-code(s) that provide more specific detail: S04.20, S04.21, S04.22.
Use S04.2 when the patients documented diagnosis matches "Injury of trochlear nerve" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Injury of trochlear nerve is S04.2.
No, S04.2 is non-billable. Use a more specific sub-code for primary diagnosis billing.
S04.2 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S04.2 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.