S01.85XA (Open bite of other part of head, initial encounter) compared with S02 (Fracture of skull and facial bones), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Not coded here — these two are mutually exclusive.
“open skull fracture (S02.- with 7th character B)”
An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.
Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a
No — do not report together. S01.85XA carries an Excludes1 note covering S02: “open skull fracture (S02.- with 7th character B)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
| S01.85XAOpen bite of other part of head, initial encounter | S02Fracture of skull and facial bones | |
|---|---|---|
| Billing status | Billable | Non-billable header Report instead: S02.0XXA, S02.0XXB, S02.0XXD, S02.0XXG, S02.0XXK |
| 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, initial encounter is a billable ICD-10-CM diagnosis code (S01.85A). | Fracture of skull and facial bones is a non-billable ICD-10-CM category code (S02). |
| 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 S02 |
| Includes | injuries of ear injuries of eye injuries of face [any part] injuries of gum | injuries of ear injuries of eye injuries of face [any part] injuries of gum |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources