In Medical Malpractice Overview, medical expert witness Eugene DeBlasio writes on substandard care, treatment or surgery:
The standard of care which is owed to people as a patients is that which represents that level of skill, expertise, and care possessed and practiced by physicians found in the same or similar community as the relevant one, and under similar circumstances. However, the advent of “national board” exams for new doctors and “board certifications” for doctor-specialists has resulted in a more uniform and standard practice of medicine not dependent upon geographic locality.
All licensed physicians should possess a basic level of skill and expertise in diagnosing and treating general or recurring types of illnesses and injuries. Thus, a general practitioner who has administered substandard cardio-pulmonary resuscitation (CPR) to a heart attack victim (who subsequently dies as a result of the substandard care) cannot defend that he or she was not a “cardio-pulmonary specialist.” A general practitioner from virtually any other area in the United States could most likely testify as to the level of care and expertise that is to be expected under the circumstances. Conversely, a board-certified cardiopulmonary specialist could not testify that the general practitioner should have done everything that the specialist might have done with his advanced skill and training. Nor, under the locality rule, could an oncology specialist in private practice in Smalltown, U. S. A., be held to the same standard of care as an oncology specialist in a large urban university teaching hospital that has state-of-the-art equipment and facilities.
Because doctors are often reluctant to testify against their colleagues (referred to by lawyers as the “conspiracy of silence”), it may be difficult to find an unbiased expert willing to testify against a negligent doctor or label the care as substandard. This is resistance applies even when they practice on opposite sides of the country: they may know one another from the national board certifications or fellowship programs established for specialists. Moreover, truly competent doctors usually communicate with one another for professional “brainstorming” on diagnosing or treating some conditions or may collaborate in research or academic publications.