‘Malpractice’ means failure on the part of a homeopathic physician, advanced practitioner of homeopathy or homeopathic assistant to exercise the degree of care, diligence and skill ordinarily exercised by homeopathic physicians, advanced practitioners of homeopathy or homeopathic assistants, respectively, in good standing in the community in which he or she practices. As used in this section, ‘community’ embraces the entire area customarily served by homeopathic physicians, advanced practitioners of homeopathy and homeopathic assistants among whom a patient may reasonably choose, not merely the particular area inhabited by the patients of that individual homeopathic physician, advanced practitioner of homeopathy or homeopathic assistant or the particular city or place where the homeopathic physician, advanced practitioner of homeopathy or homeopathic assistant has an office.