S01.85XD (Open bite of other part of head, subsequent encounter) compared with T18.0 (Foreign body in mouth), 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 mouth NOS (T18.0)”
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. S01.85XD carries an Excludes2 note covering T18.0: “effects of foreign body in mouth NOS (T18.0)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
| S01.85XDOpen bite of other part of head, subsequent encounter | T18.0Foreign body in mouth | |
|---|---|---|
| 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 | Open bite of other part of head, subsequent encounter is a billable ICD-10-CM diagnosis code (S01.85D). | Foreign body in mouth is a non-billable ICD-10-CM category code (T18.0). |
| 7th character | The appropriate 7th character is to be added to each code from category S01 | The appropriate 7th character is to be added to each code from category T18 |
| Includes | injuries of ear injuries of eye injuries of face [any part] injuries of gum | — |
| 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