For a health care website...It truly depends on your situation. I would say it is not enough to just ask what you are asking. Would have to do some looking into, I mean are you trying to rank some healthcare affiliate products? Are you trying to become a resource for some type of health care? Or are you just trying to rank your local dentist site? (LOL)
as an SEO Executive i think the there is not just a "Single page factor(whether its Off-page or On-page)"can rank your webpage because google(or any other search engine) just don't include a single factor in their PageRank algorithm.So you need to concentrate on both On-Page factor as well as Off-Page factor.But yes,Backlinks from High PR sites have more value.