Chiming in as Devil's Advocate from a insurance consultant/broker perspective. The reason brokers and employers may want the reporting is to be able to measure the impact of the DPC versus the assumptions. So if you can at least document the visit via the Administrator the data will then be able to be aggregated very easily. The TPA or broker should have analytical tools that take the raw claim data and then lever it in a bunch of ways. If this system has the ability to segregate those participating in the DPC from those who do not you will have a great case study, especially with the downstream spend reduction in lab/rad/rx which is the main way you show ROI to the employer who is paying for this service.
Obviously I don't know about Dino's particular situation and completely trust his ability to asses, just wanted to let you know what the employers are looking at. And frankly, if they are paying for something they have a right to determine the cost benefit just like you do when you purchase items, use consultants or subscribe to services.