S66.0 — Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level
Not billable
Is S66.0 billable?
No — S66.0 is a non-billable header code. S66.0 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 36 billable codes beneath S66.0.
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
S66.0 at a glance
| Code | S66.0 |
|---|---|
| Description | Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Use additional code — inherited from Chapter 19
Report an additional code alongside S66.0 to fully describe the condition. S66.0 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 S66.0, but a patient may have both at the same time. When documentation supports it, S66.0 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S66.0, but a patient may have both at the same time. When documentation supports it, S66.0 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S66
The conditions below are not part of S66.0, but a patient may have both at the same time. When documentation supports it, S66.0 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 S66.0 is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
What codes fall under S66.0? (4)
- S66.00Unspecified injury of long flexor muscle, fascia and tendon of thumb at wrist and hand levelnot billable
- S66.01Strain of long flexor muscle, fascia and tendon of thumb at wrist and hand levelnot billable
- S66.02Laceration of long flexor muscle, fascia and tendon of thumb at wrist and hand levelnot billable
- S66.09Other specified injury of long flexor muscle, fascia and tendon of thumb at wrist and hand levelnot billable
How long has S66.0 existed?
S66.0 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.
What other codes are in the S66 family? (7)
- 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