Do doctors sometimes formally or informally rank the seriousness of TBI cases?

Physicians view all brain injuries as serious matters. However, after your doctors have observed your behavior and examined your test results, they may note that you are suffering from either a mild traumatic brain injury (MBTI) – or a more moderate or severe case. Each of these designations refer to your level of cognitive impairment or ability to think clearly and easily communicate with others. Those coping with lighter cases may only suffer temporary problems like minor headaches, special sensitivity to light and sound, depression and a limited degree of memory loss.
Patients coping with more moderate cases may experience problems moving different limbs. The most serious cases often involve patients who are in a vegetative state or a coma.
Always keep in mind that even those initially thought to only have minor TBI symptoms can develop much more serious problems, including seizures, in the near future or at a much later date.