S21.331A vs S21.339A
S21.331A (Puncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity, initial encounter) compared with S21.339A (Puncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter), from the official CMS tabular data. S21.331A and S21.339A code the same condition on opposite sides.
Can these codes be reported together?
Same condition, opposite side. S21.331A and S21.339A 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.
Side by side
| S21.331APuncture wound without foreign body of right front wall of thorax with penetration into thoracic cavity, initial encounter | S21.339APuncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, initial 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 without foreign body of right front wall of thorax with penetration into thoracic cavity, initial encounter is a billable ICD-10-CM diagnosis code (S21.331A). | Puncture wound without foreign body of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter is a billable ICD-10-CM diagnosis code (S21.339A). |
| 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