Answer:
Mrs. Tanner can opt for non-plan doctors in certain services without advance referral.
Step-by-step explanation:
In HMO, the point of services provides enrolls with the permission to go for non-plan doctors in exclusive cases without any prior referral. Though most of the cases are covered under the providers who fall under the plan, point of service option however, works in emergency, urgent care in out of area and dialysis in out of area. An example of this kind kind of case is- screening mammograms.