You may want to try the following professionals:

Dr. Liz Smith
www.kinderminds.com
Neuroeducational evaluations
Bellevue

Dr. Nancy Torgerson
Developmental Optometrist
Alderwood Vision Therapy
Lynnwood & satellite office in Redmond

Dr. Liz Zeitlin
Audiologist
Northwest Auditory Processing Clinic
Issaquah

Northwest Gifted Child Association
nwgca.org
Resources, events, newsletter, etc.

For a truly integrated approach, your best bet may be Seattle Children's Hospital or Dr. Smith although you'll have to pre-screen for relevance to your child's particular situation and LOG.

I know how frustrating it can be in the search for appropriate professional help. Best of luck!