The implications of the Stark Phase II regulations when considered in light of Medicare reimbursement restrictions merit a new look.. In our AGG Note "Medicare Reimbursement Through The Stark Looking Glass", we elucidate some of the contradictions and unappreciated pitfalls lurking in issues pertaining to physician-to-physician referrals, in-office ancillary services, incident to billing, reassignment, and diagnostic testing. Unlike our previous AGG Notes, “Stark II, Phase II: The Interim Final Story”, (May 2004) and “Much Better Late Than We Thought: Stark II Final Regulations”, (February 2001) rather than reporting on the contents of the Stark regulations, this new AGG Note is more analytical. It should be read with the other two for a complete understanding of the internecine workings of Stark.