Billable / Specific Code
ICD-10-CM S66.118 is the diagnosis code for Strain of flexor muscle, fascia and tendon of other finger at wrist and hand level. This code falls under the section "Injuries to the wrist, hand and fingers" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where S66.118 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, S66.118 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
S66.118 is the ICD-10-CM diagnosis code for "Strain of flexor muscle, fascia and tendon of other finger at wrist and hand level". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of S66.118 is S66.11 ("Strain of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level"). S66.118 provides a more specific classification within this category.
S66.118 is located in Section S60-S69 — "Injuries to the wrist, hand and fingers" within Chapter 19 of the ICD-10-CM Tabular List.
Use S66.118 when the patients documented diagnosis matches "Strain of flexor muscle, fascia and tendon of other finger 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 Strain of flexor muscle, fascia and tendon of other finger at wrist and hand level is S66.118.
Yes, S66.118 can be used as a primary diagnosis code since it is billable and specific.
S66.118 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S66.118 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.