H05.5 vs S05
H05.5 and S05 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on H05.5
current penetrating wound of orbit (S05.4-)
H05.5
Retained (old) foreign body following penetrating wound of orbit
Not billable
- Chapter 7
- Diseases of the eye and adnexa
- Section
- H00-H05
Use when the record says
- Retrobulbar foreign body
Indexed under
- Foreign body › orbit › old, retained
S05
Injury of eye and orbit
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- S00-S09
Use when the record says
- open wound of eye and orbit
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027