Health Insurance Deduction for Independent Contractor

I'm an independent contractor on Medicare with a Medigap policy.  The Medigap policy is the one offered by CalPERS (CalPERS: California Public Employees' Retirement System) through my wife's former employer, but I pay for it.  She is not yet Medicare eligible and her entire premium is still covered by CalPERS as a retiree.  

 

My question is: Can I take a deduction of the whole premium (Medicare and Medigap), just the Medicare, or none at all?  My net income exceeds the cost of the premiums, so no limitation there.

 

Thank you!