A lot of basic stuff -- ear infections, covid medication, etc. Which would include nurses fees, medications, etc.
I did several months of physical therapy which entailed therapy plus specialist vists.
Several X-rays and 2 MRIs.
And currently planning a surgery on my ankle which is also covered.
Never had to pay anything out of pocket since I've been using them. Only complaint is that the first time using them at a new hospital can require some liaising between VUMI and the insurance dept to make sure the correct payment guarantees are sent over to establish direct billing.