Part A & Part B are supposed to have the exact same coverage under MA plans. That is similar or apples to apples. However, like you mentioned the
Networks are different. That is not the same as coverage though. Even in all of these MA plans state that you must continue to pay your "Part B premiums". Medicare states Part A, B, & Usually D are "Bundled" into an MA Plan C.
When I talk about this stuff you know what I'm saying when I say MA or OM (Original Medicare) in the context of the conversation. I wouldn't just say "Use your Part B" for your Dr visit, or "Show your Part B card to your Dr"...LOL That could certainly get confusing & not really understandable conveyance.
All of these Evidence of Coverage pdf's continue to refer to these Parts by their respective alphabets. Handbook say "
Include Part A,B, & Usually D, (Doesn't say Exclude) So...

We'll agree to disagree on that & agree that context matters to make the difference.
Medicare Handbook 2026
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I'll put this out there for anyone to read. This is my point of view. My point of view hasn't change in this forum for years.
I do not care what anyone chooses for health care. In years of posts in this forum I am a big advocate of Advantage plans. However that landscape is changing depending on your state. One needs to be aware of max out of pocket costs, changes to networks and cost.
You keep saying the coverage is the same. So let the public decide. I
am the first in here to ALWAYS make sure people understand for years. IF MEDICARE COVERS A PROCEDURE under A and B, Advantage plans must also cover the service, after all the government pays the Advantage insurers your premium. There can be a rare exception such as experimental treatments but if Medicare A and B pays for that experimental treatment you may be able to convince your Advantage plan to pay for it OR Medicare itself may consider paying for it.
If you consider the following the same, that is good by me. To me, not close to the same.
1. Part A and Part B - you can literally get medical care and doctors anyplace in the USA, any facility. If they take Medicare which almost everyone does.
Advantage Plan - depending on what plan you have, you can not get care anyplace in the USA, when signing up for a plan, you need to make sure your doctors are in the plan, make sure any hospitals in your area and REALLY good hospitals outside your area are in the plan. With Plan A and B you do not, so is that the same?
2. WIth Medicare A and B for almost every procedure covered under A and B you do not need to go through an approval process.
With Advantage plans many procedures and tests must be submitted for pre approval (not a problem, doctor takes care of that, but its a big scare tactic still not the same as Part A and Part B. However as I said over and over, if Medicare A and B covers the procedure an Advantage plan must also. Though that procedure will have to be done in a facility that is in your Advantage plan.
3. With Medicare A and B you can also choose a drug plan Part D from an insurer. You can choose based on what drugs you may need and related costs.
IN Advantage plans you can only get the Drug plan that comes with the policy so you need to make sure if there is a specific drug that you need it is in the plan.
4. Part A and B do not include Drugs, you need to get a separate plan from a company. Part A and B not include many things besides a drug plan, an many Advantage plans include such as a vision plan, dental plan, money to buy over the counter items, cheap gym plan.
5. Advantage plans are all in one plans, I think they are great however since around 2021 for a 3 year period government has not given these plan insurers an increase in premiums. Many things have been tightened up. My concern is MOOPs (max out of pocket costs) have increased tremendously in some states, almost all but you can still find some plans with low MOOPs. I just signed up for a Humana with $3,500 MOOP. Which means no matter what happens to me the most I can pay out of pocket is $3,500. I checked all my doctors and medical facilities and they are all in the plan. Humana is also nationwide.
Great deal, you have to get really sick to hit that MOOP. Such as heart operation, cancer etc. My current plan even provides up to $2.500 of dental expenses a year and free vision check up plus $150 towards glasses or contact lenses. It also gives me $50 every three months to buy over the counter items you would find in a drug store, even suntan lotion, hand lotion, vitamins etc etc
Medicare only part A & B of course you need to also pick a Drug plan called Part D (and pay for it)
Medicare A and B also requires you to pay 20% off all Part B medical bills. Just think of the cost, lets say of getting cancer and needing Chemo you would pay 20% of those costs as an example. Most people, I think something like 90% or more buy Supplemental Private Insurance also known as Medigap to pay for the Part B medical expenses. Then you are home free. All your medical expenses are covered. You do pay extra every month for that coverage and it can get costly depending on ago and state in which you live. Over time these extra costs can easily get up to $300 a month. Price varies widely on age and state you live in, even county you live in.
"IN" hospital bills Part A is covered 100% but not medical costs.
@fantastic Posted a chart above in Post # 174, highlighting the differences in the plans. Simple stuff. It clearly outlines the differences in the Part A and B vs Advantage plans. If someone wants to call that coverage the same fine by me. I certainly do not see it that was. However as I repeated for years, as far as medical procedures if Part A and Part B medicare cover the procedure Advantage plans must also cover it.