S66.211 (Strain of extensor muscle, fascia and tendon of right thumb at wrist and hand level) compared with S66.219 (Strain of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level), from the official CMS tabular data. S66.211 and S66.219 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. S66.211 and S66.219 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.
| S66.211Strain of extensor muscle, fascia and tendon of right thumb at wrist and hand level | S66.219Strain of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Strain of extensor muscle, fascia and tendon of right thumb at wrist and hand level is a non-billable ICD-10-CM category code (S66.211). | Strain of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level is a non-billable ICD-10-CM category code (S66.219). |
| 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