Sounds like you need to get management involved. Let your ANM know, especially now since his hard-headed behavior (Assuming your end of the story is true,) lead to a patient "event". The bare MINIMUM a physician can offer is yes or no WITH rationale. Never let a doctor just say "no" and walk off, be assertive and ask for answers. "No" can sometimes be a "I don't want to deal with it" vs an actual rationale that is specific to the patient. Always ask for clarification and elaboration, I don't care how rude or eye-rolly the doctor is. It is your job to advocate for your patient and it requires you to stand up to these kind of physicians.