G93.5 vs S06
G93.5 and S06 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 G93.5
traumatic compression of brain (S06.A-)
G93.5
Compression of brain
Billable
- Chapter 6
- Diseases of the nervous system
- Section
- G89-G99
Use when the record says
- Arnold-Chiari type 1 compression of brain
- Compression of brain (stem)
- Herniation of brain (stem)
- Midline shift of brain
Indexed under
- Compression › brain
- Hernia, hernial › foramen magnum (acquired) (recurrent)
- Herniation › brain
- Herniation › cerebral
- Pressure › brain
S06
Intracranial injury
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- S00-S09
Use when the record says
- traumatic brain injury
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