Non-Billable / Non-Specific Code
ICD-10-CM S66 is the diagnosis code for Injury of muscle, fascia and tendon at wrist and hand level. This code falls under the section "Injuries to the wrist, hand and fingers" within Chapter 19 â 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.
The following conditions are not included in S66. If the patient has both, code each condition separately:
Understanding where S66 sits in the ICD-10-CM classification helps ensure proper coding:
No, S66 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
S66 is the ICD-10-CM diagnosis code for "Injury of muscle, fascia and tendon at wrist and hand level". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
S66 is located in Section S60-S69 â "Injuries to the wrist, hand and fingers" within Chapter 19 of the ICD-10-CM Tabular List.
S66 has 8 sub-code(s) that provide more specific detail: S66.0, S66.1, S66.2, S66.3, S66.4 and more.
Use S66 when the patients documented diagnosis matches "Injury of muscle, fascia and tendon at wrist and hand level" 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 muscle, fascia and tendon at wrist and hand level is S66.
No, S66 is non-billable. Use a more specific sub-code for primary diagnosis billing.
S66 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S66 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.