You can read the full opinion here, but the conclusion seems to be that POPTS are okay in WA….
“This case presents numerous issues relating to the important issue of delivery of health care services in the state of Washington. In resolving the matters before us, we have relied upon the intent of the legislature. The legislature remains free to adopt another course should it see fit to do so. With respect to the case before us, we affirm the trial court’s grant of summary judgment to BFOA on Columbia’s PSCA claim and direct the trial court to enter summary judgment for BFOA on Columbia’s corporate practice of medicine doctrine and antirebate statute claims. We affirm the trial court’s denial of the remaining summary judgment motions, including the court’s denial of summary judgment on Columbia’s CPA claim.”