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Health Care Reform:

Health Insurance & Affordable Care Act

WebMD News from Kaiser Health News

Study: Supplemental Plans Raise Medicare Costs 22 Percent

By Jay Hancock

Wed, Jan 08 2014

Restaurants know customers eat more at fixed-price buffets than when they pay à la carte. Economists have been saying for years that the same kind of behavior goes on in the federal Medicare program for seniors and the disabled.

Supplemental "Medigap" plans shield millions from Medicare's deductibles and other out-of-pocket costs. Pay a flat Medigap premium to a private insurer such as UnitedHealthcare or Humana and you might have little or no out-of-pocket expense for doctor visits, hospitalization or other Medicare services.

Naturally many worry that the all-you-can-eat model inflates Medicare's costs by encouraging consumers to seek -- or doctors to order -- potentially unnecessary procedures. Now economists at the University of Texas and the University of Chicago have taken what some call the closest look yet at the relationship between Medigap coverage and Medicare spending.

Their conclusion, that Medigap substantially increases what Medicare spends on treatment and tests, gives new ammunition to those who want to restrict these plans. But not all health policy analysts are fans of the study.

Marika Cabral and Neale Mahoney analyzed interstate metro areas where Medigap premiums varied significantly based on which state subscribers lived in.

Medigap premiums are based largely on statewide health costs, not local. So consumers on the Vermont side of the Bennington metro area, for example, paid a little more than $1,000 a year for Medigap coverage during the period studied. But those who lived on the New York side paid substantially more -- about $1,500.

Cabral and Mahoney focused on the disparities to measure how higher prices reduced demand for Medigap plans and how cross-border differences in Medigap use affected Medicare treatment and spending among similar populations.

They found that in places like the Vermont side of the metro area, where Medigap coverage was more prevalent, there was also more utilization of Medicare services. Their bottom line: Medicare spends 22.2 percent more for individuals with Medigap plans than for those without.

"If someone has Medigap relative to not having Medigap, the public system is going to spend $1,396 more on them a year," Cabral said in an interview.

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