S20.171A (Other superficial bite of breast, right breast, initial encounter) compared with S20.172A (Other superficial bite of breast, left breast, initial encounter), from the official CMS tabular data. S20.171A and S20.172A 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. S20.171A and S20.172A 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.
| S20.171AOther superficial bite of breast, right breast, initial encounter | S20.172AOther superficial bite of breast, left breast, initial encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Other superficial bite of breast, right breast, initial encounter is a billable ICD-10-CM diagnosis code (S20.171A). | Other superficial bite of breast, left breast, initial encounter is a billable ICD-10-CM diagnosis code (S20.172A). |
| 7th character | The appropriate 7th character is to be added to each code from category S20 | The appropriate 7th character is to be added to each code from category S20 |
| Includes | injuries of breast injuries of chest (wall) injuries of interscapular area | injuries of breast injuries of chest (wall) injuries of interscapular area |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources