Back in my college days (yes, the automobile had been invented by then), some type of group insurance was available from through the University, but it had to be applied for at registration.
Also, ask the carrier of your family insurance about continuation through school.
In the mean time, you really need to have a talk with Andrew's Cardiologist about the SLOW return of INR results. He needs better follow-up than he is getting.
You might also ask if there is a Real Coumadin Clinic he could transfer to. Clinics that specialize in anticoagulation management generally provide much better care than individual nurse / doctor providers.
Be sure to also tell his cardiologist how many days his INR was Below 1.5 and ask how that should be handled should it happen again. His Cardiologist REALLY needs to know what is happening with his INR. Are you charting his doses and INR test results?
'AL Capshaw'