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S66.126S vs S66.127S

S66.126S (Laceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level, sequela) compared with S66.127S (Laceration of flexor muscle, fascia and tendon of left little finger at wrist and hand level, sequela), from the official CMS tabular data. S66.126S and S66.127S code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S66.126S
Right
Laceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level, sequela
S66.127S
Left
Laceration of flexor muscle, fascia and tendon of left little finger at wrist and hand level, sequela

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. S66.126S and S66.127S 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

S66.126SLaceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level, sequelaS66.127SLaceration of flexor muscle, fascia and tendon of left little finger at wrist and hand level, sequela
Billing statusBillableBillable
ClassificationS00-T88 — Injury, poisoning and certain other consequences of external causesS00-T88 — Injury, poisoning and certain other consequences of external causes
DefinitionLaceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level, sequela is a billable ICD-10-CM diagnosis code (S66.126S).Laceration of flexor muscle, fascia and tendon of left little finger at wrist and hand level, sequela is a billable ICD-10-CM diagnosis code (S66.127S).
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

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources