S66.310 — Strain of extensor muscle, fascia and tendon of right index finger at wrist and hand level
Is S66.310 billable?
No — S66.310 is a non-billable header code. S66.310 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 S66.310.
Billable codes under this header
- S66.310AStrain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, initial encounter
- S66.310DStrain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, subsequent encounter
- S66.310SStrain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, sequela
S66.310 at a glance
| Code | S66.310 |
|---|---|
| Description | Strain of extensor muscle, fascia and tendon of right index 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 S66.310 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S66.31, the nearest indexed parent of S66.310. Use them to find the family, then select the specific code.
- Injury › muscle › finger › index › extensor › hand level › strain
- Injury › muscle › finger › little › extensor › hand level › strain
- Injury › muscle › finger › middle › extensor › hand level › strain
- Injury › muscle › finger › ring › extensor › hand level › strain
Use additional code — inherited from Chapter 19
Report an additional code alongside S66.310 to fully describe the condition. S66.310 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 S66.310, but a patient may have both at the same time. When documentation supports it, S66.310 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S66.310, but a patient may have both at the same time. When documentation supports it, S66.310 and the excluded code may both be reported.
Excludes2 — not included here — inherited from S66
The conditions below are not part of S66.310, but a patient may have both at the same time. When documentation supports it, S66.310 and the excluded code may both be reported.
- sprain of joints and ligaments of wrist and hand (S63.-)
Excludes2 — not included here — inherited from S66.3
The conditions below are not part of S66.310, but a patient may have both at the same time. When documentation supports it, S66.310 and the excluded code may both be reported.
- Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level (S66.2-)
Code also — inherited from S66
Two codes may be needed to describe the condition fully. Whether S66.310 is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
What codes fall under S66.310? (3)
- S66.310AStrain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, initial encounter
- S66.310DStrain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, subsequent encounter
- S66.310SStrain of extensor muscle, fascia and tendon of right index finger at wrist and hand level, sequela
How long has S66.310 existed?
S66.310 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 S66.31 family? (9)
- S66.311Strain of extensor muscle, fascia and tendon of left index finger at wrist and hand levelnot billable
- S66.312Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand levelnot billable
- S66.313Strain of extensor muscle, fascia and tendon of left middle finger at wrist and hand levelnot billable
- S66.314Strain of extensor muscle, fascia and tendon of right ring finger at wrist and hand levelnot billable
- S66.315Strain of extensor muscle, fascia and tendon of left ring finger at wrist and hand levelnot billable
- S66.316Strain of extensor muscle, fascia and tendon of right little finger at wrist and hand levelnot billable
- S66.317Strain of extensor muscle, fascia and tendon of left little finger at wrist and hand levelnot billable
- S66.318Strain of extensor muscle, fascia and tendon of other finger at wrist and hand levelnot billable
- S66.319Strain of extensor muscle, fascia and tendon of unspecified finger at wrist and hand levelnot billable