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S66.326 vs S66.327

S66.326 (Laceration of extensor muscle, fascia and tendon of right little finger at wrist and hand level) compared with S66.327 (Laceration of extensor muscle, fascia and tendon of left little finger at wrist and hand level), from the official CMS tabular data. S66.326 and S66.327 code the same condition on opposite sides.

Relationship

Review

Laterality relationship

S66.326
Right
Laceration of extensor muscle, fascia and tendon of right little finger at wrist and hand level
↔
S66.327
Left
Laceration of extensor muscle, fascia and tendon of left little finger at wrist and hand level

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. S66.326 and S66.327 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

S66.326Laceration of extensor muscle, fascia and tendon of right little finger at wrist and hand levelS66.327Laceration of extensor muscle, fascia and tendon of left little finger at wrist and hand level
Billing statusNon-billable header

Report instead: S66.326A, S66.326D, S66.326S

Non-billable header

Report instead: S66.327A, S66.327D, S66.327S

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)
DefinitionLaceration of extensor muscle, fascia and tendon of right little finger at wrist and hand level is a non-billable ICD-10-CM category code (S66.326).Laceration of extensor muscle, fascia and tendon of left little finger at wrist and hand level is a non-billable ICD-10-CM category code (S66.327).
7th characterThe appropriate 7th character is to be added to each code from category S66The appropriate 7th character is to be added to each code from category S66
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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