I have my CPC-A. Now I want my CPB. Is this redundant?

In my area, I see a lot of medical billing positions. Way more than coding. I now landed a medical billing job which I start Monday. I graduated from a medical billing and coding program but it was very coding heavy, not so much billing. I feel like CPB would complement my CPC, as well as make me more marketable for future billing positions.

CPB is also one of those certifications I never see anyone have. Is there a point to getting it when you can learn on the job? Also, will I get paid...

I have my CPC-A. Now I want my CPB. Is this redundant?