S66.10 — Unspecified injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
Not billable
Is S66.10 billable?
No — S66.10 is a non-billable header code. S66.10 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 30 billable codes beneath S66.10.
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
S66.10 at a glance
| Code | S66.10 |
|---|---|
| Description | Unspecified 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 |
How is S66.10 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to S66.10. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Injury › muscle › finger › little › flexor › hand level
- Injury › muscle › finger › middle › flexor › hand level
- Injury › muscle › finger › ring › flexor › hand level
Use additional code — inherited from Chapter 19
Report an additional code alongside S66.10 to fully describe the condition. S66.10 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 S66.10, but a patient may have both at the same time. When documentation supports it, S66.10 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S66.10, but a patient may have both at the same time. When documentation supports it, S66.10 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S66
The conditions below are not part of S66.10, but a patient may have both at the same time. When documentation supports it, S66.10 and the excluded code may both be reported.
- sprain of joints and ligaments of wrist and hand (S63.-)
Excludes2 — not included here — inherited from S66.1
The conditions below are not part of S66.10, but a patient may have both at the same time. When documentation supports it, S66.10 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-)
Code also — inherited from S66
Two codes may be needed to describe the condition fully. Whether S66.10 is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
What codes fall under S66.10? (10)
- S66.100Unspecified injury of flexor muscle, fascia and tendon of right index finger at wrist and hand levelnot billable
- S66.101Unspecified injury of flexor muscle, fascia and tendon of left index finger at wrist and hand levelnot billable
- S66.102Unspecified injury of flexor muscle, fascia and tendon of right middle finger at wrist and hand levelnot billable
- S66.103Unspecified injury of flexor muscle, fascia and tendon of left middle finger at wrist and hand levelnot billable
- S66.104Unspecified injury of flexor muscle, fascia and tendon of right ring finger at wrist and hand levelnot billable
- S66.105Unspecified injury of flexor muscle, fascia and tendon of left ring finger at wrist and hand levelnot billable
- S66.106Unspecified injury of flexor muscle, fascia and tendon of right little finger at wrist and hand levelnot billable
- S66.107Unspecified injury of flexor muscle, fascia and tendon of left little finger at wrist and hand levelnot billable
- S66.108Unspecified injury of flexor muscle, fascia and tendon of other finger at wrist and hand levelnot billable
- S66.109Unspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand levelnot billable
How long has S66.10 existed?
S66.10 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 S66.1 family? (3)
- 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