A new subcategory S06.A, Traumatic brain compression and herniation, has been created with new codes to identify traumatic brain compression with and without herniation. The new codes with the corresponding seventh characters for initial encounter, subsequent encounter and sequela are as follows:
- S06.A0, Traumatic brain compression without herniation
- S06.A1, Traumatic brain compression with herniation
Traumatic brain injury (TBI) is one of the most common causes of brain compression and brain herniation. Different parts of the brain may herniate, each causing a different clinical syndrome. Brain compression may also be significant, whether or not herniation is present. Brain compression and herniation may be fatal if not treated.
The presence or absence of brain compression or herniation is an important clinical distinction. TBI is an important area of research, and having codes to differentiate whether or not brain herniation is present will allow for enhanced research and possibly advance the care of these patients.
When assigning codes for traumatic brain herniation, sequence first a code for the underlying TBI, such as diffuse TBI, focal TBI, traumatic subdural hemorrhage, traumatic subarachnoid hemorrhage, etc. An Excludes1 note was added at code G93.5, Compression of brain, to exclude subcategory S06.A, Traumatic brain compression and herniation.