Dr.s responsibility?

This just happened last night on my shift, (7p-7a). A resident that is IDDM had an BS of 522 @hs. We are to report to the Doc if this one is over 500. It was a Friday night, followed protcol and order of the s/s and gave resident the alloted humalog. Resident was asymptomatic. Their Doc was not on call but was having the Doc on call paged. I tried two times to reach this person, but to no avail. Left our number so they could call back. My fellow nurse had a resident on their side that was doing bad and tried to get ahold of this Doc, leaving numbers and messages for them. This all happened around 8pm. We tried a few more times, but by then, it was going on 12am and the residents had stablized. My question is, Aren't the physicans on call accountable for these residents? Is this not neglect that they never called back? This Doc is known for this behavior and has done this in the past. Since they did not call back, it makes me wonder what risks as a nurse I would be taking with my licensure with this resident. I know that I would want to send them in to the hospital if they took a turn for the worse, but HEY! I need a Doctors order for that! What do ya'll think? Has this happened to you?