The American Academy of Physical Medicine and Rehabilitation (AAPMR) is the medical society for the specialty of physical medicine and rehabilitation. The Web site includes a directory of member PM&R physicians (physiatrists) that can be searched by last name, location, or telephone number.

The National Center for Complementary and Alternative Medicine (NCCAM) at the National Institutes of Health (NIH) explores complementary and alternative healing practices in the context of rigorous science, trains complementary and alternative medicine researchers, and gives out authoritative information.

The National Pain Foundation (NPF) promotes the recovery of persons in pain. NPF's website provides information and resources in an interactive way that encourages patients to take an active role in managing their chronic pain. The My Pain section of the website includes a Personal Inventory section to help pain patients identify the information they need to manage their pain.

The NPF has information about pain conditions such as arthritis, back and neck pain, and cancer pain. The NPF addresses the many approaches to pain management, such as medicines, injections, surgery, acupuncture, biofeedback, chiropractic, and physical therapy. The NPF also provides support for the special needs of children in pain and information about psychological factors related to pain. The website also provides information on clinical trials that are studying pain management and treatment.