As demonstrated by the beautiful casinos in Vegas....You can't beat the system forever.

Medicare has expressly defined maintenance care and clearly stated it is a non-covered service.  Nevertheless,  many chiropractors have tried to beat the system and bill for maintenance care (as defined by Medicare---a practice management company's definition is not relevant!).

From the May, 2009 OIG (Office of the Inspector General) Medicare Report

• In 2006, Medicare inappropriately paid $178 million (out of
  $466 million) for chiropractic claims for services that medical reviewers
  determined to be maintenance therapy ($157 million), miscoded
  ($11 million), or undocumented ($46 million).
• 47 percent of all allowed chiropractic claims that met study criteria. 
  Claims representing $36 million had multiple errors 
  
• Efforts to stop payments for maintenance therapy have been largely ineffective.
  
• 78 percent of those treatment episodes that became maintenance therapy did so by the 20th visit.
• Chiropractors often do not comply with the Manual documentation requirements.