Is S86.399S a billable ICD-10 code?

Yes. S86.399S (Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, sequela) is billable and can be used for insurance claims. Always verify payer-specific requirements.

S86.399S ✓ Billable

Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, sequela

Q: What is ICD-10 code S86.399S?

ICD-10-CM code S86.399S stands for "Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, sequela". It is a billable code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

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

Code

S86.399S

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 S86.399S?

ICD-10-CM code S86.399S represents Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, 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 S86.399S billable?

Yes. S86.399S is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is S86.399S in?

S86.399S belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.

Related codes in the S86 category

S86 Injury of muscle, fascia and tendon at lower leg level Non-billable S86.0 Injury of Achilles tendon Non-billable S86.1 Injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level Non-billable S86.2 Injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level Non-billable S86.3 Injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level Non-billable S86.8 Injury of other muscles and tendons at lower leg level Non-billable S86.9 Injury of unspecified muscle and tendon at lower leg level Non-billable S86.00 Unspecified injury of Achilles tendon Non-billable

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