S66.1 — Injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
Not billable
Is S66.1 billable?
No — S66.1 is a non-billable header code. S66.1 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 S66.1.
Billable codes under this header
- 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
- S66.108AUnspecified injury of flexor muscle, fascia and tendon of other finger at wrist and hand level, initial encounter
- S66.108DUnspecified injury of flexor muscle, fascia and tendon of other finger at wrist and hand level, subsequent encounter
- S66.108SUnspecified injury of flexor muscle, fascia and tendon of other finger at wrist and hand level, sequela
- S66.109AUnspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, initial encounter
- S66.109DUnspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, subsequent encounter
- S66.109SUnspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, sequela
- S66.110AStrain of flexor muscle, fascia and tendon of right index finger at wrist and hand level, initial encounter
- S66.110DStrain of flexor muscle, fascia and tendon of right index finger at wrist and hand level, subsequent encounter
- S66.110SStrain of flexor muscle, fascia and tendon of right index finger at wrist and hand level, sequela
- S66.111AStrain of flexor muscle, fascia and tendon of left index finger at wrist and hand level, initial encounter
- S66.111DStrain of flexor muscle, fascia and tendon of left index finger at wrist and hand level, subsequent encounter
- S66.111SStrain of flexor muscle, fascia and tendon of left index finger at wrist and hand level, sequela
- S66.112AStrain of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, initial encounter
- S66.112DStrain of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, subsequent encounter
- S66.112SStrain of flexor muscle, fascia and tendon of right middle finger at wrist and hand level, sequela
- S66.113AStrain of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, initial encounter
- S66.113DStrain of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, subsequent encounter
- S66.113SStrain of flexor muscle, fascia and tendon of left middle finger at wrist and hand level, sequela
- S66.114AStrain of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, initial encounter
- S66.114DStrain of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, subsequent encounter
- S66.114SStrain of flexor muscle, fascia and tendon of right ring finger at wrist and hand level, sequela
- S66.115AStrain of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, initial encounter
- S66.115DStrain of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, subsequent encounter
- S66.115SStrain of flexor muscle, fascia and tendon of left ring finger at wrist and hand level, sequela
- S66.116AStrain of flexor muscle, fascia and tendon of right little finger at wrist and hand level, initial encounter
- S66.116DStrain of flexor muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter
- S66.116SStrain of flexor muscle, fascia and tendon of right little finger at wrist and hand level, sequela
- S66.117AStrain of flexor muscle, fascia and tendon of left little finger at wrist and hand level, initial encounter
- S66.117DStrain of flexor muscle, fascia and tendon of left little finger at wrist and hand level, subsequent encounter
- S66.117SStrain of flexor muscle, fascia and tendon of left little finger at wrist and hand level, sequela
- S66.118AStrain of flexor muscle, fascia and tendon of other finger at wrist and hand level, initial encounter
- S66.118DStrain of flexor muscle, fascia and tendon of other finger at wrist and hand level, subsequent encounter
- S66.118SStrain of flexor muscle, fascia and tendon of other finger at wrist and hand level, sequela
- S66.119AStrain of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, initial encounter
- S66.119DStrain of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, subsequent encounter
- S66.119SStrain of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, sequela
S66.1 at a glance
| Code | S66.1 |
|---|---|
| Description | Injury of flexor muscle, fascia and tendon of other and unspecified finger 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 S66.1, but a patient may have both at the same time. When documentation supports it, S66.1 and the excluded code may both be reported.
- Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level (S66.0-)
Use additional code — inherited from Chapter 19
Report an additional code alongside S66.1 to fully describe the condition. S66.1 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 S66.1, but a patient may have both at the same time. When documentation supports it, S66.1 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S66.1, but a patient may have both at the same time. When documentation supports it, S66.1 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S66
The conditions below are not part of S66.1, but a patient may have both at the same time. When documentation supports it, S66.1 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 S66.1 is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
What codes fall under S66.1? (4)
- S66.10Unspecified injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand levelnot billable
- S66.11Strain of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand levelnot billable
- S66.12Laceration of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand levelnot billable
- S66.19Other injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand levelnot billable
How long has S66.1 existed?
S66.1 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)
- S66.0Injury of long flexor muscle, fascia and tendon of thumb 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