Part A is for hosptial and Part B is for doctor visits, out patient surgery, etc.
I take it that you are still working, therefore your wife has coverage through your policy.
There is no logical reason why your policy would deny these claims because she HAS to have Medicare Part B.
It could be the way the claim was submitted in which it was flagged as other insurance involvement.
This issue with your insurance carriers can be resolved. There are several ways to do this. Either you can contact your employers HR dept and ask that they contact their carrier (BCBS) to get this resolved and / or contact the billing departments who is in charge of billing and have them review said claims that were submitted and ask that they contact BCBS as well and / or contact BCBS and speak with a supervisor for resolution that they, BCBS, should cover these charges as your wife does have Medicare coverage however it is only for Hospital stays (Part A) so in that case these other charges that are not related to inpatient stays are to be paid by BCBS.
I have dealt with BCBS thoughout the US and they can be a nightmare, however if you know how they operate can make it this somewhat easier. BC is a nightmare.
Keep notes on the number that you called or was transferred to, their name(s), date called and time, dept, control number (this identifies your claim within their system)...each claim will have it's own control number. So if you have to call back and they can't find the claim that was previously found...give them the control number. Works like a charm.
I might even suggest that you send a certified letter to your insurance carrier(s) as well as your state insurance commissioner.
From my own personal experience I did the above letters and it worked.
Don't give up and please be involved in your bills. You can always ask for your providers to audit any billing statements that you received. They can not refuse, that is your right.
I've been in this field for 20 years so I do know what I am speaking of.
Best of Luck and sorry to hear about your wife's diagnosis'. I too have MS and will have a breast bx on Monday due to two suspicious lumps.
May I ask ~ did your wife have chemo and / or radiation due to breast cancer and how did that affect her MS and the MS symptoms?
Best Wishes,
~Zig