I agree with the poster who said to double check that your ins. doesn't just need verification. You may have already...but they're notorious for not "mentioning" x. Especially when 'x' is something easy, that would keep someone qualified :P
Beyond that: Here's personal experience:
The UW student medical is decent. Not spectacular, but decent. Several steps above Group Health, to have a comparative. Just by being a student there (if that's where your son is at) he would have free/majorly discounted access to tons of practitioners & specialists. You CAN buy extra insurance through them, and it's usually a good idea.
The insurance offered by most of the community colleges though, is a joke. This info is a year old...but this is what we found out looking at what was offered through BCC. It's cheap at around 200 a month but it ONLY covers illness & injury. IE you can go to the Dr. for the flu...but not for cancer/ headaches/ therapy (physical or mental)/ physicals/ birthcontrol/ STD testing(or god forbid treatment)/ etc. & the "injury" when we looked into it only covered acute care for broken bones & lacerations, but not follow-up care, antibiotics...etc. SOME surgeries were allowed (for example in the case of car accidents), but only surgeries due to injuries, and only the initial lifesaving surgery. All the ancillary stuff (anesthesiologists, labs, xrays, secondary surgeries, etc.) was not covered.
Ummm....having worked in healthcare for years, it's usually better to have NO insurance then crappy insurance. If you have no insurance & an emergency occurs, the hospital helps you apply for state aid/grants/probono work. If you have insurance but it's lousy, you're on the hook AND you have to do all the footwork yourself AND you're disallowed from most of those programs.
Summation : If he's at a U (UW, SU, WSU, WWU, etc.) he's probably already eligible for care...but it's worth checking into & USUALLY worth buying supplemental insurance.
If he's at a CC look into private insurance.