Why haven't you been getting mail statements? I've been retired and on Tricare Prime for over 25 years. I get a statement for every office visit and every instance of a prescription fill for both myself and my wife. On every statement has the entire, highly detailed breakdown. I'd be contacting my primary and get that fixed.
I get a billing statement from BCBS for office visits. They state how much BCBS paid minus the $10 copay. On the paper work there is a field for “Other Insurance” which is always $0.00. Maybe the health care provider does not send the bill to my secondary insurance Tricare Prime.