Wiki OPPS Procedure code Bundling Rule

[fannieaapc]

Article by Denise Williams, stated "Drugs used as stress agents (e.g., adenosine, dobutamine, regadenoson, dipyridamole) are packaged into the myocardial perfusion imaging portion (CPT? 78452 Myocardial perfusion imaging, tomographic (SPECT) (including attenuation correction, qualitative or quantitative wall motion, ejection fraction by first pass or gated technique, additional quantification, when performed); multiple studies, at rest and/or stress (exercise or pharmacologic) and/or redistribution and/or rest reinjection) of the stress test."

Question: Where was information gathered from? Are there supporting articles?
Please advise.

http://news.aapc.com/index.php/2014/02/2014-opps-the-year-of-unprecedented-packaging/