Would most health insurance pay to have an abscessed tooth pulled if the patient is already in the hospital?

My brother has a brain abscess that has been tied to an abscessed tooth. He needs to have the tooth pulled, but couldn't it be done while he's in the hospital and cheaper?
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Well, the hospital is the most expensive place to have everything done. But no, most health insurance policies won't cover it. It's a dental issue. Neglecting dental issues CAN lead to health issues, but it doesn't make it NOT a dental issue. And heck, it costs around $100 to $150, depending on the tooth, to have it pulled. So it's not exactly breaking the bank, anyway.
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