S21.042D (Puncture wound with foreign body of left breast, subsequent encounter) compared with S21.049D (Puncture wound with foreign body of unspecified breast, subsequent encounter), from the official CMS tabular data. S21.042D and S21.049D 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. S21.042D and S21.049D 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.
| S21.042DPuncture wound with foreign body of left breast, subsequent encounter | S21.049DPuncture wound with foreign body of unspecified breast, subsequent encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| 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 | Puncture wound with foreign body of left breast, subsequent encounter is a billable ICD-10-CM diagnosis code (S21.042D). | Puncture wound with foreign body of unspecified breast, subsequent encounter is a billable ICD-10-CM diagnosis code (S21.049D). |
| 7th character | The appropriate 7th character is to be added to each code from category S21 | The appropriate 7th character is to be added to each code from category S21 |
| 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