S86.9

⚠ Non-billable (Header)

Injury of unspecified muscle and tendon at lower leg level

Injury, poisoning and certain other consequences of external causes (S00-T88)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

inherited

Rules inherited from parent codes.

S86

• injury of muscle, fascia and tendon at ankle (S96.-)
• injury of patellar ligament (tendon) (S76.1-)
• sprain of joints and ligaments of knee (S83.-)

Child Codes (4)

S86.90Unspecified injury of unspecified muscle and tendon at lower leg levelHeader S86.91Strain of unspecified muscle and tendon at lower leg levelHeader S86.92Laceration of unspecified muscle and tendon at lower leg levelHeader S86.99Other injury of unspecified muscle and tendon at lower leg levelHeader

Clinical Description

ICD-10-CM code S86.9 represents injury of unspecified muscle and tendon at lower leg level. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 5-character code at the 4th level of specificity. There are 4 more specific child codes under S86.9.

Frequently Asked Questions

What is ICD-10 code S86.9?

ICD-10-CM code S86.9 is "Injury of unspecified muscle and tendon at lower leg level". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S86.9 a billable ICD-10 code?

No, S86.9 is a non-billable header code. A more specific child code must be used for billing.

Can S86.9 be coded with other codes?

S86.9 has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S86

Other codes in the same category that may be relevant for differential coding:

S86.0Injury of Achilles tendon S86.1Injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level S86.2Injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level S86.3Injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level S86.8Injury of other muscles and tendons at lower leg level

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Code Information

CodeS86.9

BillableNo — Header code

ParentS86

CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)

Excludes10 rule(s)

Excludes23 note(s)

Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)