oncooncogene

I think it's mean to be a good review on the field and what's possible. They're also covering what you shouldn't do with EHR data and some of the dangers

I think this article actually agrees with you. The very first NOTE is this:

""" Note: Be cautious about using data that was primarily created for insurance purposes. Often, it's not truly reflective of patient's condition but rather encompassing for billing / profit. Luckily, there are clinical reports, like radiology, diagnostic imaging, pathology reports, etc., that are intended for physician use and are more reflective of true patient conditions. Unfortunately, most of this data is not readily available in APIs because it's largely unstructured. This is a ripe space for ML to take raw, unstructured data and produce structured, computable data. """