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[Vendor] Accordant (www.accordant.com) The first and as of this writing (November 2013) the only “legacy” disease management vendor to offer valid outcomes measurement using the Dummy Year Analysis proven by Why Nobody Believes the Numbers to be required in order to create the most valid pre-post measurement in the population health management field. [Comments/Qualifications] 
Of course in population health there can always be confounding variables such as new drugs and/or small sample sizes and/or unobservable variables, but there are no qualifications to the statement that there is no more valid pre-post measurement in the field today. Click here for the Accordant template used to achieve this Gold Standard designation, which Accordant is graciously making publicly available in the hopes that other vendors will follow their lead.
The DMPC Gold Standard: The Exhaustive Listing of Vendors/Carriers/Consultants Measuring Validly | Disease Management Purchasing Consortium
Comments/Qualifications