S66 — Injury of muscle, fascia and tendon at wrist and hand level
Not billable
Is S66 billable?
No — S66 is a non-billable header code. S66 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 60 billable codes beneath S66.
Billable codes under this header
- S66.001AUnspecified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, initial encounter
- S66.001DUnspecified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, subsequent encounter
- S66.001SUnspecified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, sequela
- S66.002AUnspecified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, initial encounter
- S66.002DUnspecified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, subsequent encounter
- S66.002SUnspecified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, sequela
- S66.009AUnspecified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, initial encounter
- S66.009DUnspecified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, subsequent encounter
- S66.009SUnspecified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, sequela
- S66.011AStrain of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, initial encounter
- S66.011DStrain of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, subsequent encounter
- S66.011SStrain of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, sequela
- S66.012AStrain of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, initial encounter
- S66.012DStrain of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, subsequent encounter
- S66.012SStrain of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, sequela
- S66.019AStrain of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, initial encounter
- S66.019DStrain of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, subsequent encounter
- S66.019SStrain of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, sequela
- S66.021ALaceration of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, initial encounter
- S66.021DLaceration of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, subsequent encounter
- S66.021SLaceration of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, sequela
- S66.022ALaceration of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, initial encounter
- S66.022DLaceration of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, subsequent encounter
- S66.022SLaceration of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, sequela
- S66.029ALaceration of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, initial encounter
- S66.029DLaceration of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, subsequent encounter
- S66.029SLaceration of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, sequela
- S66.091AOther specified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, initial encounter
- S66.091DOther specified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, subsequent encounter
- S66.091SOther specified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level, sequela
- S66.092AOther specified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, initial encounter
- S66.092DOther specified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, subsequent encounter
- S66.092SOther specified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level, sequela
- S66.099AOther specified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, initial encounter
- S66.099DOther specified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, subsequent encounter
- S66.099SOther specified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level, sequela
- S66.100AUnspecified injury of flexor muscle, fascia and tendon of right index finger at wrist and hand level, initial encounter
- S66.100DUnspecified injury of flexor muscle, fascia and tendon of right index finger at wrist and hand level, subsequent encounter
- S66.100SUnspecified injury of flexor muscle, fascia and tendon of right index finger at wrist and hand level, sequela
- S66.101AUnspecified injury of flexor muscle, fascia and tendon of left index finger at wrist and hand level, initial encounter
- S66.101DUnspecified injury of flexor muscle, fascia and tendon of left index finger at wrist and hand level, subsequent encounter
- S66.101SUnspecified injury of flexor muscle, fascia and tendon of left index finger at wrist and hand level, sequela
- S66.102AUnspecified injury of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, initial encounter
- S66.102DUnspecified injury of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, subsequent encounter
- S66.102SUnspecified injury of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, sequela
- S66.103AUnspecified injury of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, initial encounter
- S66.103DUnspecified injury of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, subsequent encounter
- S66.103SUnspecified injury of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, sequela
- S66.104AUnspecified injury of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, initial encounter
- S66.104DUnspecified injury of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, subsequent encounter
- S66.104SUnspecified injury of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, sequela
- S66.105AUnspecified injury of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, initial encounter
- S66.105DUnspecified injury of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, subsequent encounter
- S66.105SUnspecified injury of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, sequela
- S66.106AUnspecified injury of flexor muscle, fascia and tendon of right little finger at wrist and hand level, initial encounter
- S66.106DUnspecified injury of flexor muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter
- S66.106SUnspecified injury of flexor muscle, fascia and tendon of right little finger at wrist and hand level, sequela
- S66.107AUnspecified injury of flexor muscle, fascia and tendon of left little finger at wrist and hand level, initial encounter
- S66.107DUnspecified injury of flexor muscle, fascia and tendon of left little finger at wrist and hand level, subsequent encounter
- S66.107SUnspecified injury of flexor muscle, fascia and tendon of left little finger at wrist and hand level, sequela
S66 at a glance
| Code | S66 |
|---|---|
| Description | Injury of 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 |
Excludes2 — not included here
The conditions below are not part of S66, but a patient may have both at the same time. When documentation supports it, S66 and the excluded code may both be reported.
- sprain of joints and ligaments of wrist and hand (S63.-)
Code also
Two codes may be needed to describe the condition fully. Whether S66 is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside S66 to fully describe the condition. S66 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, but a patient may have both at the same time. When documentation supports it, S66 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S66, but a patient may have both at the same time. When documentation supports it, S66 and the excluded code may both be reported.
What codes fall under S66? (8)
- S66.0Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand levelnot billable
- S66.1Injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand levelnot billable
- S66.2Injury of extensor muscle, fascia and tendon of thumb at wrist and hand levelnot billable
- S66.3Injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand levelnot billable
- S66.4Injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand levelnot billable
- S66.5Injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand levelnot billable
- S66.8Injury of other specified muscles, fascia and tendons at wrist and hand levelnot billable
- S66.9Injury of unspecified muscle, fascia and tendon at wrist and hand levelnot billable
How long has S66 existed?
S66 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.