S86.121

⚠ Non-billable (Header)

Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg

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 (3)

S86.121ALaceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, initial encounter✓ Billable S86.121DLaceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, subsequent encounter✓ Billable S86.121SLaceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, sequela✓ Billable

Clinical Description

ICD-10-CM code S86.121 represents laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg. 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 7-character code at the 6th level of specificity. There are 3 more specific child codes under S86.121.

Frequently Asked Questions

What is ICD-10 code S86.121?

ICD-10-CM code S86.121 is "Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S86.121 a billable ICD-10 code?

No, S86.121 is a non-billable header code. A more specific child code must be used for billing.

Can S86.121 be coded with other codes?

S86.121 has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S86.12

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

S86.122Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg S86.129Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg

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Code Information

CodeS86.121

BillableNo — Header code

ParentS86.12

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

Excludes10 rule(s)

Excludes23 note(s)

Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)