S56.423 (Laceration of extensor muscle, fascia and tendon of right middle finger at forearm level) compared with S56.424 (Laceration of extensor muscle, fascia and tendon of left middle finger at forearm level), from the official CMS tabular data. S56.423 and S56.424 code the same condition on opposite sides.
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. S56.423 and S56.424 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.
| S56.423Laceration of extensor muscle, fascia and tendon of right middle finger at forearm level | S56.424Laceration of extensor muscle, fascia and tendon of left middle finger at forearm level | |
|---|---|---|
| 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 | Laceration of extensor muscle, fascia and tendon of right middle finger at forearm level is a non-billable ICD-10-CM category code (S56.423). | Laceration of extensor muscle, fascia and tendon of left middle finger at forearm level is a non-billable ICD-10-CM category code (S56.424). |
| 7th character | The appropriate 7th character is to be added to each code from category S56 | The appropriate 7th character is to be added to each code from category S56 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources