American Public Health Association
Promotes the scientific and professional foundation of public health practice and policy with an emphasis on prevention and community health.

Medical Group Management Association
The leading organization for professionals in medical practice management. Links to California and Nevada chapters of MGMA.

National Health Information Center
Health information referral service that puts healthcare professionals with questions in touch with professional organizations that can provide answers.

Pam Pohly's Net Guide to online Healthcare Associations
Healthcare consulting firm with more than 125 links to healthcare professional associations and academies.