Medicare Advantage Plans are easy to use. You get services. Your Plan reviews and approves payment. You pay only the cost share the Plan shows on the EOB.
INN (IN-Network) (aka contracted) providers are best to visit because services are rendered under contractual conditions and pre-agreed. Everyone knows what to expect. While some Plan designs (PPO or POS) allow visits to any providers who will accept payment from the Plan, usually your costs are higher.
The Explanation of Benefits (EOB) is produced by the insurer and shows who is charging for services (the Provider), what's contractually due, what's been contractually paid (to the Provider), and, what's contractually due from the patient (the beneficiary).
When using a contracted provider, your responsibility is only what the Plan shows on the EOB.
The best course of action is to not pay any billings from the provider until your plan shows you what you owe.
At times, there are differences of opinion between what the Contracted Provider bills and the Plan pays.
Some Contracted Providers bill the patient who they see as the responsible party for the difference. This is not permissible under the Plan's contract.
The Contracted Provider, prior to services rendered, must advise you and you must agree to pay, charges that will not be covered. If they do not advise and you do not agree, you are not obligated to pay.
Should the Provider submit charges to the Plan with errors, the Plan will deny payment. The resolution is, the Provider corrects and resubmits to the Plan. The Plan approves the billing, pays the Provider and you pay your cost share as determined by the Plan. Further disagreements are usually settled under an appeal.
Prescription Drug coverage, when included in a MAPD plan, is a separate category with separate rules. Medicare makes the rules, just as they do for medical coverage. Depending on the drug administered, the Plan may require prior authorization, step therapy, limited amounts, or alternative choices. Some drugs are given under medical premise and billed as such.
Starting January 1, 2026, the rules are changing. For 2027 The Prescription Drug Out-of-Pocket Maximum is $2400. The Coverage Gap Phase is discontinued as of 2024. As a result, there may be some cost adjustments in different plans in different companies.