title: When a PPO is silent.
authors.forename: H
authors.initials: H
authors.lastname: Lippman
mesh_terms: D003363:Cost Control; D005607:Fraud / Q000331:legislation & jurisprudence; D006264:Health Benefit Plans, Employee / Q000191:economics / Q000331:legislation & jurisprudence / Q000458:organization & administration*; D006801:Humans; D011243:Preferred Provider Organizations / Q000191:economics / Q000331:legislation & jurisprudence / Q000458:organization & administration*; D014481:United States