The VA awards disability compensation for each Skull condition that is service-connected. The DoD will also rate service-connected Skull conditions as long as they also make the service member Unfit for Duty. For Reservists, the Skull condition must have occurred in or resulted from an injury in the Line of Duty to qualify.
Often injuries to the Skull result from other serious conditions, like TBI, brain cancer, surgical treatment, and more. Because of this, conditions of the Skull can only be rated if they are not already covered by a rating for the condition that caused it (Pyramiding Principle). Luckily, all brain codes do not cover damage to the Skull, so a rating for the Skull can be given in addition to any brain rating.
The VASRD only gives a single code to rate conditions of the Skull, code 5296.