S23.9XXA (Sprain of unspecified parts of thorax, initial encounter) compared with T17.4 (Foreign body in trachea), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Distinct conditions — both may be reported.
“effects of foreign body in trachea (T17.4)”
An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.
Source: CMS ICD-10-CM tabular instructional notes
Yes, when both are documented. S23.9XXA carries an Excludes2 note covering T17.4: “effects of foreign body in trachea (T17.4)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
| S23.9XXASprain of unspecified parts of thorax, initial encounter | T17.4Foreign body in trachea | |
|---|---|---|
| Billing status | Billable | 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 | Sprain of unspecified parts of thorax, initial encounter is a billable ICD-10-CM diagnosis code (S23.9A). | Foreign body in trachea is a non-billable ICD-10-CM category code (T17.4). |
| 7th character | The appropriate 7th character is to be added to each code from category S23 | The appropriate 7th character is to be added to each code from category T17 |
| Includes | avulsion of joint or ligament of thorax laceration of cartilage, joint or ligament of thorax sprain of cartilage, joint or ligament of thorax traumatic hemarthrosis of joint or ligament of thorax | — |
| Use additional code | — | code, if known, for foreign body entering into or through a natural orifice (W44.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources