A lot of "healthcare" angel is really life science and doesn't get tech/ data plays. On the tech side, a lot of the money is in device or things like radiology. Check out who's raised money/ funded things lately...there are a number of folks who pretend they're in the game, but don't really play.
Funding has gone up and down, depending on the specifics of the play -- a few folks that are fairly well connected in the space and may be able to point you in the right direction include:
- Rock Health (accelerator)
- Health Innovation Partners (mostly later stage)
- Local health foundations (e.g., California Healthcare Foundation)
You may also want to check in with places like First Round Capital that have investments (fitbit) that would benefit from your product.
Looks like you're connected into the Kaiser network...hope you've got a pilot that's straightforward to launch!