S66.523 — Laceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level
Is S66.523 billable?
No — S66.523 is a non-billable header code. S66.523 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 3 billable codes beneath S66.523.
Billable codes under this header
- S66.523ALaceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level, initial encounter
- S66.523DLaceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level, subsequent encounter
- S66.523SLaceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level, sequela
S66.523 at a glance
| Code | S66.523 |
|---|---|
| Description | Laceration of intrinsic muscle, fascia and tendon of left middle 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 S66.523 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S66.52, the nearest indexed parent of S66.523. Use them to find the family, then select the specific code.
- Injury › muscle › finger › index › intrinsic › laceration
- Injury › muscle › finger › little › intrinsic › laceration
- Injury › muscle › finger › middle › intrinsic › laceration
- Injury › muscle › finger › ring › intrinsic › laceration
Use additional code — inherited from Chapter 19
Report an additional code alongside S66.523 to fully describe the condition. S66.523 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 S66.523, but a patient may have both at the same time. When documentation supports it, S66.523 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S66.523, but a patient may have both at the same time. When documentation supports it, S66.523 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S66
The conditions below are not part of S66.523, but a patient may have both at the same time. When documentation supports it, S66.523 and the excluded code may both be reported.
- sprain of joints and ligaments of wrist and hand (S63.-)
Excludes2 — not included here — inherited from S66.5
The conditions below are not part of S66.523, but a patient may have both at the same time. When documentation supports it, S66.523 and the excluded code may both be reported.
- injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level (S66.4-)
Code also — inherited from S66
Two codes may be needed to describe the condition fully. Whether S66.523 is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
What codes fall under S66.523? (3)
- S66.523ALaceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level, initial encounter
- S66.523DLaceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level, subsequent encounter
- S66.523SLaceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level, sequela
How long has S66.523 existed?
S66.523 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 S66.52 family? (9)
- S66.520Laceration of intrinsic muscle, fascia and tendon of right index finger at wrist and hand levelnot billable
- S66.521Laceration of intrinsic muscle, fascia and tendon of left index finger at wrist and hand levelnot billable
- S66.522Laceration of intrinsic muscle, fascia and tendon of right middle finger at wrist and hand levelnot billable
- S66.524Laceration of intrinsic muscle, fascia and tendon of right ring finger at wrist and hand levelnot billable
- S66.525Laceration of intrinsic muscle, fascia and tendon of left ring finger at wrist and hand levelnot billable
- S66.526Laceration of intrinsic muscle, fascia and tendon of right little finger at wrist and hand levelnot billable
- S66.527Laceration of intrinsic muscle, fascia and tendon of left little finger at wrist and hand levelnot billable
- S66.528Laceration of intrinsic muscle, fascia and tendon of other finger at wrist and hand levelnot billable
- S66.529Laceration of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand levelnot billable