His dive physician does not seem on top of things......maybe some other, more current, dive physician?
If I knew somebody in the OP's area of the world I might be able to make a recommendation. The only guy I know is in Oman. For clarity, I think that the OP needs to take the DAN guidelines on diving with diabetes back to both his endocrinologist and his diving physician and have a conversation with both of them based on that.
For @Sidemount Serge , DAN is not just an NGO. The DAN guidelines on diving with diabetes were written by Dr. Neal Pollock, one of the foremost researchers on diving in the world; Donna Uguccioni, at the time a prominent DAN researcher; and Dr. Guy Dear, a board-certified undersea medicine physician. The workshop was co-sponsored by the Undersea and Hyperbaric Medical Society.
Best regards,
DDM