They consult and refer to each other learning of each others strengths and weaknesses. There is almost a fraternal ritual when a medical doctor comes to town. This has allowed each and every medical provider in a town to have their practices flourish and grow. The chiropractic professional has no universal fraternal front. Each is an individual who is not interested in working with the rest of the health care community.
Medical doctors standardize their approach to treatment thereby ensuing a mutual understanding.
One reason for their reluctance is the lack of standardization and protocols many chiropractors take to their profession. There are some chiropractors that when asked about their professional background will explain it to you as if they are reciting a grocery list. Ask a medical doctor about their background and it sounds professionally impressive. Ask a chiropractor for a curriculum vitae or resume, and most do not even have one. If they did, it would be a half page in length, and the contents unimpressive.