The July 31 NYT Opinionator blog described in some detail pricing transparency at The Oklahoma Surgery Center. The NYT blog does not allege that Medicare prohibits pricing transparency (we discussed that question here back on July 10). The NYT blog described several private sector and regulatory initiatives (including Obamacare) to promote pricing transparency in health care.
Bottom line: I still see no evidence that Medicare prohibits pricing transparency for surgery centers.
ps. The blog did not h/t or link to Tyler Cowen at Marginal Revolution, who posted on this back on July 10.