Any way to get around an elderly parent's refusal of HIPAA and healthcare proxy for me?

My 89 yr old father has refused to allow his doctors to provide me with any information about his medical problems. I do not have POA or healthcare proxy and am the only child. He also refused permission for the doctors to inform his wife (my mother) of his healthcare issues.
This started last year when he was hospitalized with pneumonia in Jan 2016 and was instructed to have a chest CT scan every 6 months, which he has refused to do since then. He stopped taking all of his medications a year ago. He has lost 50 lbs in 9 months and now looks emaciated even though he eats regularly. He also smells rotten for some reason (he showers and keeps clean but smells like rotting). A month ago, his entire body swelled up and he was in pain and given colcichine and some aspirin. He has a history of gout so I thought this was a full body attack of gout. He used to smoke for 35 years and has a smoker's cough ever since I can remember. He's never been a nice man, always irritable with a violent temper. It's gotten progressively worse and he's become increasingly bitter. I can't help but wonder if the doctor told him he had some terminal disease that he's hiding from us?

I've called the doctor and also tried to speak with him while at the hospital but have been told numerous times that my father has specifically refused permission to allow him to give me healthcare details, due to HIPAA.

I'm at a loss here, any ideas please? Thanks much.