S66.20
Header — not billableUnspecified injury of extensor muscle, fascia and tendon of thumb at wrist and hand level
The ICD-10 code for unspecified injury of extensor muscle, fascia and tendon of thumb at wrist and hand level is S66.20.
S66.20 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under S66.20
- S66.201Unspecified injury of extensor muscle, fascia and tendon of right thumb at wrist and hand level
- S66.202Unspecified injury of extensor muscle, fascia and tendon of left thumb at wrist and hand level
- S66.209Unspecified injury of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level
Related codes in this category
- S66.21Strain of extensor muscle, fascia and tendon of thumb at wrist and hand levelnon-billable header
- S66.22Laceration of extensor muscle, fascia and tendon of thumb at wrist and hand levelnon-billable header
- S66.29Other specified injury of extensor muscle, fascia and tendon of thumb at wrist and hand levelnon-billable header
- S66.20Unspecified injury of extensor muscle, fascia and tendon of thumb at wrist and hand levelnon-billable header