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S86.311 vs S86.319

S86.311 (Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg) compared with S86.319 (Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg), from the official CMS tabular data. S86.311 and S86.319 code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S86.311
Right
Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg
↔
S86.319
Unspecified
Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. S86.311 and S86.319 name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

S86.311Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right legS86.319Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg
Billing statusNon-billable header

Report instead: S86.311A, S86.311D, S86.311S

Non-billable header

Report instead: S86.319A, S86.319D, S86.319S

ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionStrain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg is a non-billable ICD-10-CM category code (S86.311).Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg is a non-billable ICD-10-CM category code (S86.319).
7th characterThe appropriate 7th character is to be added to each code from category S86The appropriate 7th character is to be added to each code from category S86
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources