Is S66.391 a billable code?
No. S66.391 is a header code that groups 3 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
S66.391: Other injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
S66.391 groups related diagnoses under other injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under S66.391
- S66.391AOther injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level, initial encounter
- S66.391DOther injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level, subsequent encounter
- S66.391SOther injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level, sequela
Other codes in S66.39 Other injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
- S66.390Other injury of extensor muscle, fascia and tendon of right index finger at wrist and hand levelheader
- S66.392Other injury of extensor muscle, fascia and tendon of right middle finger at wrist and hand levelheader
- S66.393Other injury of extensor muscle, fascia and tendon of left middle finger at wrist and hand levelheader
- S66.394Other injury of extensor muscle, fascia and tendon of right ring finger at wrist and hand levelheader
- S66.395Other injury of extensor muscle, fascia and tendon of left ring finger at wrist and hand levelheader
- S66.396Other injury of extensor muscle, fascia and tendon of right little finger at wrist and hand levelheader
- S66.397Other injury of extensor muscle, fascia and tendon of left little finger at wrist and hand levelheader
- S66.398Other injury of extensor muscle, fascia and tendon of other finger at wrist and hand levelheader
- S66.399Other injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand levelheader
S66.391 questions
What does S66.391 mean?
S66.391 is the ICD-10-CM code for Other injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level. It is in chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.