Silent PPOs are not PPOs.
Elden
D L
DL
D003284:Contract Services / Q000458:organization & administration; D005249:Fees and Charges; D008389:Marketing of Health Services / Q000592:standards*; D011243:Preferred Provider Organizations / Q000458:organization & administration / Q000592:standards*; D009626:Terminology as Topic; D014342:Truth Disclosure; D014481:United States