Supporters of the Affordable Care Act celebrate after the Supreme Court up held the law in the 6-3 vote at the Supreme Court in Washington June 25, 2015. The U.S. Supreme Court on Thursday upheld the nationwide availability of tax subsidies that are crucial to the implementation of President Barack Obama's signature healthcare law, handing a major victory to the president. REUTERS/Joshua Roberts 

Doctor Vivek Murthy stands among other bystanders during the first day of legal arguments over the Affordable Care Act outside the Supreme Court in Washington March 26, 2012. U.S. President Barack Obama's sweeping healthcare overhaul on Monday went before the U.S. Supreme Court where the nine justices began hearing arguments in a historic test of the law's validity under the U.S. Constitution. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS HEALTH CIVIL UNREST) 

U.S. President Barack Obama signs the healthcare legislation during a ceremony in the East Room of the White House in Washington, March 23, 2010. Obama sealed a hard-fought victory on Tuesday by signing into law a landmark healthcare reform measure that will help shape his legacy and the Democrats' chances of holding power in the U.S. Congress. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS HEALTH IMAGES OF THE DAY) 

Demonstrators in favor of Obamacare gather at the Supreme Court building in Washington March 4, 2015. The U.S. Supreme Court will consider on Wednesday a second major legal attack on President Barack Obama's healthcare law, with conservative challengers taking aim at a pivotal part of the statute that authorizes tax subsidies to help people afford insurance. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH CIVIL UNREST) 

Doctor Andy Chiou (L) speaks to patient Carl Dolson in a hyperbaric chamber in Peoria, Illinois, November 26, 2013. Now, patients are at the forefront of an experiment, under way in Peoria, Illinois, and hundreds of other U.S. cities, that could transform the way doctors, nurses and hospitals deliver care to patients. Amid the barrage of criticism over the rollout of Obamacare, groups known as Accountable Care Organizations (ACOs) are quietly going about the business of testing the potential for healthcare reform. The efforts, born of President Barack Obama's Affordable Care Act, are part of the biggest experiment yet to fix the costly and error-plagued U.S. healthcare system. The new models of care, which encourage providers to form networks to coordinate care and cut costs, involve close monitoring of the sickest patients to address budding health problems before they cause a costly trip to the emergency room or an extended hospital stay. To match Feature USA-HEALTHCARE/PEORIAPicture taken November 26, 2013. REUTERS/Jim Young (UNITED STATES - Tags: HEALTH POLITICS) 

Devon Fagel (L), a physician and cancer survivor, argues in favor of Obamacare with Phil Kerpen (R), who was part of a Tea Party Patriots demonstration against the health care law, in front of the Supreme Court building in Washington March 4, 2015. The U.S. Supreme Court will consider on Wednesday a second major legal attack on President Barack Obama's healthcare law, with conservative challengers taking aim at a pivotal part of the statute that authorizes tax subsidies to help people afford insurance. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS HEALTH CIVIL UNREST) 

Six-month-old Hazel Garcia chews a pamphlet at a health insurance enrollment event in Cudahy, California March 27, 2014. More than 6 million people have now signed up for private insurance plans under President Barack Obama's signature healthcare law known as Obamacare, reflecting a surge in enrollments days before the March 31 deadline, the White House said on Thursday. More than 1 million people have signed up for Obamacare in California, according to the Los Angeles Times. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS TPX IMAGES OF THE DAY) 

A resident of south Florida holds a sign protesting healthcare reforms during a visit by U.S. President Barack Obama to Miami, Florida, October 26, 2009. The U.S. healthcare system is just as wasteful as Obama says it is, and proposed reforms could be paid for by fixing some of the most obvious inefficiencies, preventing mistakes and fighting fraud, according to a Thomson Reuters report released on Monday. REUTERS/Carlos Barria (UNITED STATES CONFLICT POLITICS HEALTH IMAGES OF THE DAY) 

Sandy Wright gets some help from her Certified Nursing Assistant Jessica Haynes at her home in Peoria, Illinois, November 25, 2013. Wright has Neuromyelitis Optica and has a Certified Nursing Assistant come to help her around the house. Now, patients like Wright are at the forefront of an experiment, under way in Peoria, Illinois, and hundreds of other U.S. cities, that could transform the way doctors, nurses and hospitals deliver care to patients. Amid the barrage of criticism over the rollout of Obamacare, groups known as Accountable Care Organizations (ACOs) are quietly going about the business of testing the potential for healthcare reform. The efforts, born of President Barack Obama's Affordable Care Act, are part of the biggest experiment yet to fix the costly and error-plagued U.S. healthcare system. The new models of care, which encourage providers to form networks to coordinate care and cut costs, involve close monitoring of the sickest patients to address budding health problems before they cause a costly trip to the emergency room or an extended hospital stay. To match Feature USA-HEALTHCARE/PEORIA Picture taken November 25, 2013. REUTERS/Jim Young (UNITED STATES - Tags: HEALTH POLITICS) 

Maria Alvarado, 30, holds her 10-month-old son Kevin Rios as she waits in line at a health insurance enrollment event in Cudahy, California March 27, 2014. More than 6 million people have now signed up for private insurance plans under President Barack Obama's signature healthcare law known as Obamacare, reflecting a surge in enrollments days before the March 31 deadline, the White House said on Thursday. More than 1 million people have signed up for Obamacare in California, according to the Los Angeles Times. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Arminda Murillo, 54, reads a leaflet at a health insurance enrollment event in Cudahy, California March 27, 2014. More than 6 million people have now signed up for private insurance plans under President Barack Obama's signature healthcare law known as Obamacare, reflecting a surge in enrollments days before the March 31 deadline, the White House said on Thursday. More than 1 million people have signed up for Obamacare in California, according to the Los Angeles Times. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

A man looks over the Affordable Care Act (commonly known as Obamacare) signup page on the HealthCare.gov website in New York in this October 2, 2013 photo illustration. The federal government's portal logged over 2.8 million visitors by afternoon October 2, largely in an attempt to sign up for Obamacare. REUTERS/Mike Segar (UNITED STATES - Tags: HEALTH SOCIETY POLITICS) 

A small group of demonstrators stand outside of the HIlton Hotel and Suites prior to former South Carolina Senator Jim DeMint, president of the The Heritage Foundation, speaking at a "Defund Obamacare Tour" rally in Indianapolis August 26, 2013. The conservative Heritage group is urging Republicans to stop funding the government past September unless money to support Obamacare is withheld. REUTERS/Nate Chute (UNITED STATES - Tags: POLITICS SOCIETY HEALTH) 

A boy draws signs at a health insurance enrolment event in Commerce, California March 31, 2014. U.S. President Barack Obama's embattled U.S. healthcare law, having survived a rollout marred by technology failures, reaches a milestone on Monday with the end of its first enrolment wave, and with the administration likely to come close to its goal of signing up 7 million people in private health insurance. More than 1 million people have signed up for Obamacare in California, according to the Los Angeles Times. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Patient Analy Navarro is is checked by Doctor Leon Yeh in the Emergency Room at OSF Saint Francis Medical Center in Peoria, Illinois, November 26, 2013. Now, patients are at the forefront of an experiment, under way in Peoria, Illinois, and hundreds of other U.S. cities, that could transform the way doctors, nurses and hospitals deliver care to patients. Amid the barrage of criticism over the rollout of Obamacare, groups known as Accountable Care Organizations (ACOs) are quietly going about the business of testing the potential for healthcare reform. The efforts, born of President Barack Obama's Affordable Care Act, are part of the biggest experiment yet to fix the costly and error-plagued U.S. healthcare system. The new models of care, which encourage providers to form networks to coordinate care and cut costs, involve close monitoring of the sickest patients to address budding health problems before they cause a costly trip to the emergency room or an extended hospital stay. To match Feature USA-HEALTHCARE/PEORIA Picture taken November 26, 2013. REUTERS/Jim Young (UNITED STATES - Tags: HEALTH POLITICS) 

Workers at Covered California's Concord call center talk to each other during the opening day of enrollment of the Patient Protection and Affordable Care Act in Concord, California October 1, 2013. Better known as "Obamacare," the Affordable Care Act requires health insurance companies to provide a basic package of benefits and prohibits them from excluding people due to prior illnesses. The Act will provide billions of dollars in government subsidies, in the form of tax credits, to help individuals buy insurance on the basis of annual income from the health insurance marketplace such as Covered California, a state-implemented exchange. REUTERS/Stephen Lam (UNITED STATES - Tags: HEALTH POLITICS BUSINESS) 

Sandy Wright looks over her bag of medications at her home in Peoria, Illinois, November 25, 2013. Wright has Neuromyelitis Optica and has a Certified Nursing Assistant come to help her around the house. Now, patients like Wright are at the forefront of an experiment, under way in Peoria, Illinois, and hundreds of other U.S. cities, that could transform the way doctors, nurses and hospitals deliver care to patients. Amid the barrage of criticism over the rollout of Obamacare, groups known as Accountable Care Organizations (ACOs) are quietly going about the business of testing the potential for healthcare reform. The efforts, born of President Barack Obama's Affordable Care Act, are part of the biggest experiment yet to fix the costly and error-plagued U.S. healthcare system. The new models of care, which encourage providers to form networks to coordinate care and cut costs, involve close monitoring of the sickest patients to address budding health problems before they cause a costly trip to the emergency room or an extended hospital stay. To match Feature USA-HEALTHCARE/PEORIA Picture taken November 25, 2013. REUTERS/Jim Young (UNITED STATES - Tags: HEALTH POLITICS) 

An audience member takes the Pledge of Allegiance before the arrival of U.S. President Barack Obama at a town hall meeting on health insurance reform at Portsmouth High School in Portsmouth, New Hampshire, August 11, 2009. REUTERS/Jim Young (UNITED STATES POLITICS HEALTH) 

A boy waits in line at a health insurance enrollment event in Cudahy, California March 27, 2014. More than 6 million people have now signed up for private insurance plans under President Barack Obama's signature healthcare law known as Obamacare, reflecting a surge in enrollments days before the March 31 deadline, the White House said on Thursday. More than 1 million people have signed up for Obamacare in California, according to the Los Angeles Times. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Enrique Gonzalez, 22, (L-R), Janet Regalado, 21, and their nine-month-old daughter Kayleen Gonzalez pose for a photo after signing up for health insurance at an enrolment event in Commerce, California March 31, 2014. U.S. President Barack Obama's embattled U.S. healthcare law, having survived a rollout marred by technology failures, reaches a milestone on Monday with the end of its first enrolment wave, and with the administration likely to come close to its goal of signing up 7 million people in private health insurance. More than 1 million people have signed up for Obamacare in California, according to the Los Angeles Times. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS)