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S66.312S ✓ Billable

Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand level, sequela

ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes

Code
S66.312S
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code S66.312S?
ICD-10-CM code S66.312S represents Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand level, sequela. It is a billable diagnosis code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is S66.312S billable?
Yes. S66.312S is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is S66.312S in?
S66.312S belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.

Related codes in the S66 category

S66 Injury of muscle, fascia and tendon at wrist and hand level Non-billable S66.0 Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level Non-billable S66.1 Injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level Non-billable S66.2 Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level Non-billable S66.3 Injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level Non-billable S66.4 Injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level Non-billable S66.5 Injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level Non-billable S66.8 Injury of other specified muscles, fascia and tendons at wrist and hand level Non-billable

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