S31.156 (Open bite of abdominal wall, right flank without penetration into peritoneal cavity) compared with S31.157 (Open bite of abdominal wall, left flank without penetration into peritoneal cavity), from the official CMS tabular data. S31.156 and S31.157 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. S31.156 and S31.157 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.
| S31.156Open bite of abdominal wall, right flank without penetration into peritoneal cavity | S31.157Open bite of abdominal wall, left flank without penetration into peritoneal cavity | |
|---|---|---|
| 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 | Open bite of abdominal wall, right flank without penetration into peritoneal cavity is a non-billable ICD-10-CM category code (S31.156). | Open bite of abdominal wall, left flank without penetration into peritoneal cavity is a non-billable ICD-10-CM category code (S31.157). |
| 7th character | The appropriate 7th character is to be added to each code from category S31 | The appropriate 7th character is to be added to each code from category S31 |
| Includes | injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia | injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources