S66.91 — Strain of unspecified muscle, fascia and tendon at wrist and hand level
Is S66.91 billable?
No — S66.91 is a non-billable header code. S66.91 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath S66.91.
Billable codes under this header
- S66.911AStrain of unspecified muscle, fascia and tendon at wrist and hand level, right hand, initial encounter
- S66.911DStrain of unspecified muscle, fascia and tendon at wrist and hand level, right hand, subsequent encounter
- S66.911SStrain of unspecified muscle, fascia and tendon at wrist and hand level, right hand, sequela
- S66.912AStrain of unspecified muscle, fascia and tendon at wrist and hand level, left hand, initial encounter
- S66.912DStrain of unspecified muscle, fascia and tendon at wrist and hand level, left hand, subsequent encounter
- S66.912SStrain of unspecified muscle, fascia and tendon at wrist and hand level, left hand, sequela
- S66.919AStrain of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, initial encounter
- S66.919DStrain of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, subsequent encounter
- S66.919SStrain of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand, sequela
S66.91 at a glance
| Code | S66.91 |
|---|---|
| Description | Strain of unspecified muscle, fascia and tendon at wrist and hand level |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is S66.91 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to S66.91. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Injury › muscle › hand › strain
Use additional code — inherited from Chapter 19
Report an additional code alongside S66.91 to fully describe the condition. S66.91 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of S66.91, but a patient may have both at the same time. When documentation supports it, S66.91 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S66.91, but a patient may have both at the same time. When documentation supports it, S66.91 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S66
The conditions below are not part of S66.91, but a patient may have both at the same time. When documentation supports it, S66.91 and the excluded code may both be reported.
- sprain of joints and ligaments of wrist and hand (S63.-)
Code also — inherited from S66
Two codes may be needed to describe the condition fully. Whether S66.91 is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
What codes fall under S66.91? (3)
- S66.911Strain of unspecified muscle, fascia and tendon at wrist and hand level, right handnot billable
- S66.912Strain of unspecified muscle, fascia and tendon at wrist and hand level, left handnot billable
- S66.919Strain of unspecified muscle, fascia and tendon at wrist and hand level, unspecified handnot billable
How long has S66.91 existed?
S66.91 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.