You can make this job work well for you, but know what you're signing up for.
Pros
The company is willing to invest in you if you have the potential to be a good programmer but lack experience or a computer science degree. They've got a system for educating you to make you productive and teach you their languages and this is something they've perfected. Good perks and benefits, this is a place you can work at for life, very hard to get fired. Good at keeping work manageable to 40-hour weeks. The people I've seen happiest at the company are those that do a great job during those hours but take advantage of the relatively easy pace to explore hobbies or interests outside of work.
Cons
Everything in done in-house, which always feels like they're trying to catch up to industry standards though it feels like they are working to change that. Low starting pay, pay advancements mostly on seniority. A lot of older code and languages are poorly documented, but you can find a lot of stuff if you search their intranet. All proprietary languages, there are some companies that hire people with MEDITECH languages but not a lot.