| Alta Regional Center | Sacramento | California | 916-978-6400 |
| Alternating Hemiplegia of Childhood Foundation | Redwood City | California | 888-225-3353 |
| Alum Rock Counseling Center | San Jose | California | 408-294-0500 |
| Alzheimer Disease Education & Referral Center (ADEAR) | Silver Spring | Maryland | 800-438-4380 |
| Alzheimer's Association | Mountain View | California | 650-962-8111 |
| Ambershope Advocacy | Sunnyvale | California | 650-461-9003 |
| AmericaEd Learning Center | San Jose | California | 408-629-8442 |
| American Behcet's Disease Association | Smithtown | New York | 631-656-0537 |
| American Brain Tumor Association | Des Plaines | Illinois | 800-886-2282 |
| American Cancer Society - Redwood Empire Region | Oakland | California | 510-452-5229 |
| American Celiac Society Dietary Support Coalition | West Orange | New Jersey | 201-325-8837 |
| American Chronic Pain Association | Rocklin | California | 800-533-3231 |
| American Dietetic Association | Chicago | Illinois | 800-877-1600 |
| American Domestic Agency, Inc. | Wilmington | Delaware | 302-478-6340 |
| American Foundation for the Blind - NY | New York | New York | 800-232-5463 |
| American Kidney Fund, Inc. | Rockville | Maryland | 800-638-8299 |
| American Liver Foundation | Cedar Grove | New Jersey | 800-223-0179 |
| American Liver Foundation, San Francisco Bay Area | San Rafael | California | 415-258-1682 |
| American Medical Consumers | La Crescenta | California | 800-836-5262 |
| American Occupational Therapy Association (AOTA) | Bethesda | Maryland | 800-729-2682 |
