Having PHI does not mean you can't access Medicare benefits. PHI covers things Medicare does not. If Medicare covers it, PHI won't (simplistically put).

As someone who spent three years worth of savings (our first house deposit) on a private hospital stay and treatment for endo because we didn't have PHI, I wouldn't be without it now. We have hospital and extras and it's more than paid for itself.

We make sure we get the best value we can out of it so that means, among other things, dentist check ups every 6 months (we've just had our last lot and for three of us we'd have been out of pocket over $450 but 100% covered by PHI! And that was just a check up, no treatment needed), chiro (covers $1200/year), optical (though an eye test every two years is covered by Medicare) etc.

As Cherished said, there are lots of other things that would have to go before we'd consider giving up our PHI. $150/month sounds expensive, but I know someone who smokes/drinks moderately and they spend $150/week on that habit. Then there's their pay TV, lunches and snacks for work 5 days a week, the DVD's they 'have' to buy every week, the Friday night take away etc etc - oooh, if only I had their budget to cut back on, we'd be rich, lol!

I know finances are tight for you, but I'd be looking at other ways to cut back before losing your PHI. Shop around, you can get a better deal than what you have and maybe you can also select the type of extras that would most benefit you and your family.