S66.992 (Other injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand) compared with S66.999 (Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand), from the official CMS tabular data. S66.992 and S66.999 code the same condition on opposite sides. MedCoder-derived
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)
Same condition, opposite side. S66.992 and S66.999 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.
| S66.992Other injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand | S66.999Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-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) |
| Definition | Other injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand is a non-billable ICD-10-CM category code (S66.992). | Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand is a non-billable ICD-10-CM category code (S66.999). |
| 7th character | The appropriate 7th character is to be added to each code from category S66 | The 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