The following degrees of relationship are included within the definition of “immediate
            relative”; (1) spouse ; (2) natural parent, child, and sibling; (3) adopted child and adoptive
            parent; (4) stepparent, stepchild, stepbrother and stepsister; (5) spouse, , son-in-law,
            daughter-in-law, brother-in-law, and sister-in-law; (6) grandparent and grandchild.
         
         NOTE:  A
                     brother-in-law or sister-in-law relationship does not exist between a physician (or
                     supplier) and
                     the spouse's  brother or sister. Neither does a parent  relationship exist between
                     the physician
                     spouse's  stepparents .