Nuclear Medicine Question for the Week of January 30, 2017

Question:

I have been getting a correct coding initiative (CCI) edit when I bill the following on the same date of service (DOS): 78815 with A9552 and code 78306 with A9503.

78815 Positron emission tomography (PET) with concurrently acquired computed tomography (CT) for attenuation correction and anatomical localization imaging; skull base to mid-thigh
A9552 Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries
78306 Bone and/or joint imaging; whole body
A9503 Technetium tc-99m medronate, diagnostic, per study dose, up to 30 millicuries

The A codes are triggering correct coding initiative (CCI) edits with the opposing imaging services. Am I billing incorrectly?