Medicare Supplement insurance is also referred to as a Medigap policy by CMS.

These names are interchangeable.
You should expect to:

Medicare Supplements are accepted by any doctor that accepts Medicare, so there are few restrictions for the doctors and specialist your clients can see.
This is especially helpful for clients who travel frequently.  Medicare Supplements are not restricted like HMO or PPO plans, so clients won’t have problems using their coverage out of network.
Another great thing about Medicare Supplements is the plans are standardized across all the carriers.