- Institute for Healthcare Advancement (IHA)
 - La Habra - Dedicated to innovating and advancing superior healthcare practices and solutions for populations across the healthcare continuum. - Institute For Molecular Medicine, The
- Huntington Beach - Studies possible microbial causes of some Gulf War related illnesses.
- Institute of Critical Care Medicine
- Palm Springs - International centre for research, study, and information in the medical, technical, ethical, and health economics fields.
- John Wayne Cancer Institute@
- Santa Monica
- Rehabilitation Research and Training Center on Aging With a Disability
- Downey - Studies health and emotional needs of persons with disabling conditions including cerebral palsy, rheumatoid arthritis, early-onset stroke, post-polio, and spinal cord injury.
- Urological Sciences Research Foundation (USRF)
- Culver City - Independent, nonprofit organisation dedicated to research and education, focusing on prostate diseases and impotency.
- William Glasser Institute@
- Chatsworth
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