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S66.801S vs S66.809S

S66.801S (Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand, sequela) compared with S66.809S (Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, sequela), from the official CMS tabular data. S66.801S and S66.809S code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S66.801S
Right
Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand, sequela
S66.809S
Unspecified
Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, 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. S66.801S and S66.809S 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

S66.801SUnspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand, sequelaS66.809SUnspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, sequela
Billing statusBillableBillable
ClassificationS00-T88 — Injury, poisoning and certain other consequences of external causesS00-T88 — Injury, poisoning and certain other consequences of external causes
DefinitionUnspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand, sequela is a billable ICD-10-CM diagnosis code (S66.801S).Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand, sequela is a billable ICD-10-CM diagnosis code (S66.809S).
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