Hi Adam,
I have just googled Monterey and neuro rehab and came across this:

Director
Phone: 831-625-4835
Community Hospital of the Monterey Peninsula - Community Hospital of the Monterey Peninsula
Community Hospital of the Monterey PeninsulaRehabilitation Services
PO Box HH
Monterey, CA, 93942
USA Certified vestibular therapists.

Specialties: General Balance Retraining, Geriatrics/Elderly Fallers, Neuro-Rehab, Orthopedic Rehab, Vestibular Assessment , Vestibular Rehab

They are not neccessarily TBI specialists, but should be able to do a thorough assessment and/ or refer you on to a specialist Physiotherapy service.

Regrads,
Andrea