US Immigration from Cambodia

We filed for her to adjust status last month and received an I-797C notice of receipt that says at the top "This notice does not grant any immigration status or benefit"

I want to sign her up for health insurance under the exchange and the government website references an I-797 being sufficient but doesn't say anything about I-797C.

When I was looking into getting her a state ID card I spoke to someone at the DMV who said they won't give her a state ID card with an I-797C, it has to be an I-797 or an I-797A.

Is she going to be able to get health insurance with an I-797C? Has anyone else had experience dealing with using the I-797C to get health insurance or other benefits and that specific document being accepted or rejected?

The Department of Motor Vehicles says that because we have filed to adjust status they will need her K-1 visa and I-797, not an I-797C, in order to issue her a license or ID card.

I'm confused about which one I'll be getting in the mail soon.

Oddly, the DMV tells me that ordinarily a K-1 visa and valid unexpired I-94 are sufficient to get a state ID card. But once you apply to adjust status, the K-1 and I-94 are no longer good enough to get a license, and you need an I-797 even if your K-1 visa and I-94 haven't expired.

They say that when DHS tells them the green card application is pending, they then reject requests for ID cards that a K-1 visa holder with proof of residence could otherwise get.

So I guess that after missing the deadline for getting her a SSN I should have applied for state ID card before adjusting status?