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S66.901 vs S66.902

S66.901 (Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand) compared with S66.902 (Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand), from the official CMS tabular data. S66.901 and S66.902 code the same condition on opposite sides.

Relationship

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Laterality relationship

S66.901
Right
Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand
↔
S66.902
Left
Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand

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. S66.901 and S66.902 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

S66.901Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, right handS66.902Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand
Billing statusNon-billable header

Report instead: S66.901A, S66.901D, S66.901S

Non-billable header

Report instead: S66.902A, S66.902D, S66.902S

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)
DefinitionUnspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand is a non-billable ICD-10-CM category code (S66.901).Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand is a non-billable ICD-10-CM category code (S66.902).
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