People receive dental treatment at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS TPX IMAGES OF THE DAY) 

A man receives dental treatment at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

People sign up for health insurance at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Patricia Broaster, 35, watches as her son Andre Boutte, 11, sits down to get his eyes tested at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Reginald Williams, 54, has his eyes tested at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Shon Baskom, 43, has his eyes examined at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Andre Boutte, 11, looks in the mirror at his new pair of glasses at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Carolyn Jackson, 68, has her blood pressure measured at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

A woman has her pulse taken at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Roseana Dyas, 33, receives dental treatment at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

People receive dental treatment at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

People line up to receive treatment at Care Harbor LA free medical clinic in Los Angeles, California October 31, 2013. The four-day clinic provides free medical, dental and vision care, prevention resources and follow-up care to thousands of un-insured, under-insured and at-risk individuals and families. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH POLITICS) 

Christopher Glass, 33, (center R) hugs Rachel Gordon, 23, as they wait in line at the Care Harbor/LA free clinic in Los Angeles September 27, 2012. The clinic will give an estimated 4,800 patients free dental work, medical exams, screenings and immunizations over four days. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH SOCIETY) 

A woman hugs a doctor after her dental treatment at the Care Harbor/LA free clinic in Los Angeles September 27, 2012. The clinic will give an estimated 4,800 patients free dental work, medical exams, screenings and immunizations over four days. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH SOCIETY) 

A woman receives an injection at the Care Harbor/LA free clinic in Los Angeles September 27, 2012. The clinic will give an estimated 4,800 patients free dental work, medical exams, screenings and immunizations over four days. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH SOCIETY) 

A board lists the variety of medical talks offered at the Remote Area Medical (RAM) clinic in Wise, Virginia July 20, 2012. RAM clinics bring free medical, dental and vision care to uninsured and under-insured people across the country and abroad. The Wise clinic was the 647th RAM expedition since 1985 and drew 1700 patients from 14 states, organizers said. Picture taken July 20, 2012. REUTERS/Mark Makela (UNITED STATES - Tags: HEALTH SOCIETY) 

A dentist cleans a patients teeth at the Remote Area Medical (RAM) clinic in Wise, Virginia July 20, 2012. RAM clinics bring free medical, dental and vision care to uninsured and under-insured people across the country and abroad. The Wise clinic was the 647th RAM expedition since 1985 and drew 1700 patients from 14 states, organizers said. Picture taken July 20, 2012. REUTERS/Mark Makela (UNITED STATES - Tags: HEALTH SOCIETY) 

Dentists work on patients at the Remote Area Medical (RAM) clinic in Wise, Virginia July 20, 2012. RAM clinics bring free medical, dental and vision care to uninsured and under-insured people across the country and abroad. The Wise clinic was the 647th RAM expedition since 1985 and drew 1700 patients from 14 states, organizers said. Picture taken July 20, 2012. REUTERS/Mark Makela (UNITED STATES - Tags: HEALTH SOCIETY) 

A patient has her blood pressure taken before receiving treatment at the Remote Area Medical (RAM) clinic in Wise, Virginia July 20, 2012. RAM clinics bring free medical, dental and vision care to uninsured and under-insured people across the country and abroad. The Wise clinic was the 647th RAM expedition since 1985 and drew 1700 patients from 14 states, organizers said. Picture taken July 20, 2012. REUTERS/Mark Makela (UNITED STATES - Tags: HEALTH SOCIETY) 

A placard advertises the Remote Area Medical (RAM) clinic in Wise, Virginia July 20, 2012. RAM clinics bring free medical, dental and vision care to uninsured and under-insured people across the country and abroad. The Wise clinic was the 647th RAM expedition since 1985 and drew 1700 patients from 14 states, organizers said. REUTERS/Mark Makela (UNITED STATES - Tags: HEALTH SOCIETY) 

A U.S. Veteran goes through an eye exam during the 2nd annual Female Veteran Stand Down, "Women with a Purpose" in Los Angeles, California July 20, 2012. The event offers free medical, mental health, dental, nutrition, housing, employment, legal and financial services to female veterans. REUTERS/Mario Anzuoni (UNITED STATES - Tags: SOCIETY MILITARY) 

Sharon Levato (L), a dentist, explains x-rays to Janet Zamora at Comprehensive Dentistry in Bloomingdale, Illinois, April 21, 2012. The practice held its "1st Annual Dentistry from the Heart", a day of free dental care for treatments such as fillings, cleaning or extractions. REUTERS/Jim Young (UNITED STATES - Tags: HEALTH SOCIETY) 

A volunteer holds a mirror for a woman as she tries on a pair of glasses during a free medical clinic organized by non-profit group Remote Area Medical at O.Co Coliseum in Oakland, California March 24, 2012. The four day free medical, dental, and optical clinic attracted thousands of attendees, often without insurance and unemployed, as well as hundreds of volunteer medical professionals. REUTERS/Stephen Lam (UNITED STATES - Tags: HEALTH SOCIETY POVERTY) 

Volunteer optometrists perform an eye exam during a free medical clinic organized by non-profit group Remote Area Medical at O.Co Coliseum in Oakland, California March 24, 2012. The four day free medical, dental, and optical clinic attracted thousands of attendees, often without insurance and unemployed, as well as hundreds of volunteer medical professionals. REUTERS/Stephen Lam (UNITED STATES - Tags: HEALTH SOCIETY POVERTY) 

Patients wait for dental work at the CareNow free healthcare clinic at the Los Angeles Sports Arena in Los Angeles, California October 20, 2011. The four-day clinic offers medical, dental and vision services to those in need and is of one of the largest free clinics in the United States. REUTERS/Jason Redmond (UNITED STATES - Tags: SOCIETY HEALTH) 

Patient Joel Yesowitch (L) of Los Angeles gets a refraction for an eye-glass prescription at the CareNow free healthcare clinic at the Los Angeles Sports Arena in Los Angeles, California October 20, 2011. The four-day clinic offers medical, dental and vision services to those in need and is of one of the largest free clinics in the United States. REUTERS/Jason Redmond (UNITED STATES - Tags: SOCIETY HEALTH) 

Patients wait for dental services at the CareNow free healthcare clinic at the Los Angeles Sports Arena in Los Angeles, California October 20, 2011. The four-day clinic offers medical, dental and vision services to those in need and is of one of the largest free clinics in the United States. REUTERS/Jason Redmond (UNITED STATES - Tags: SOCIETY HEALTH) 

Rachel Lowe, 50, has her throat examined as part of a street medicine program between Venice Family Clinic and St Joseph Homeless Day Center in Venice, Los Angeles, California, February 16, 2011. The program aims to take free medical care to around 50 of the most at risk homeless people on the street and in shelters so they are less likely to need expensive hospitalization, and to provide them with housing. REUTERS/Lucy Nicholson (UNITED STATES - Tags: SOCIETY HEALTH) 

Dr Coley King (L) examines Frank Rawles, 70, as part of a street medicine program between Venice Family Clinic and St Joseph Homeless Day Center on Venice Beach, Los Angeles February 16, 2011. Rawles, who has been homeless since 1992, had been experiencing abdominal pain for 10 days. The program aims to take free medical care to around 50 of the most at risk homeless people on the street and in shelters so they are less likely to need expensive hospitalization, and to provide them with housing. REUTERS/Lucy Nicholson (UNITED STATES - Tags: HEALTH SOCIETY) 

Patient Badshah Rahman waits to get his blood pressure checked in the Family Van in Boston, Massachusetts August 9, 2010. Every week, dozens of residents from this low-income Boston neighborhood visit the Family Van, a nonprofit clinic which performs simple, free health screenings that can alert patients to impending health problems. Advocates say this approach can help control the rising cost of health care by helping people with chronic diseases to stay out of the emergency room. Picture taken August 9, 2010. To match Feature USA-HEALTH/MOBILE/ REUTERS/Brian Snyder (UNITED STATES - Tags: HEALTH BUSINESS SOCIETY) 

Client Viola Sanon has her finger pricked for a blood sugar test in the Family Van in Boston, Massachusetts, August 9, 2010. Every week, dozens of residents of this low-income Boston neighborhood stop into the Family Van, an RV manned by healthcare workers affiliated with Harvard Medical School who perform simple, free screenings, including blood pressure, body mass index and blood sugar, which can alert patients if they face an elevated risk for diabetes, hypertension or other chronic conditions. REUTERS/Brian Snyder (UNITED STATES - Tags: HEALTH SOCIETY) 

Healthcare educator Rainelle White (R) and Dr. Zach Wallace (3rd R) talks to client Viola Sanon (2nd R) in the Family Van in Boston, Massachusetts August 9, 2010. Every week, dozens of residents of this low-income Boston neighborhood stop into the Family Van, an RV manned by healthcare workers affiliated with Harvard Medical School who perform simple, free screenings, including blood pressure, body mass index and blood sugar, which can alert patients if they face an elevated risk for diabetes, hypertension or other chronic conditions. REUTERS/Brian Snyder (UNITED STATES) 

Healthcare educator Rainelle White (R) talks to client Viola Sanon outside the Family Van in Boston, Massachusetts August 9, 2010. Every week, dozens of residents of this low-income Boston neighborhood stop into the Family Van, an RV manned by healthcare workers affiliated with Harvard Medical School who perform simple, free screenings, including blood pressure, body mass index and blood sugar, which can alert patients if they face an elevated risk for diabetes, hypertension or other chronic conditions. REUTERS/Brian Snyder (UNITED STATES - Tags: HEALTH SOCIETY) 

Princess-Nakai Adkins, 6, waits to receive medical treatment during the Remote Area Medical (RAM) health clinic at the Forum in Inglewood, California, August 14, 2009. The Remote Area Medical Volunteer Corp (RAM) is a non-profit organization that provides free health care, dental care and eye care in remote areas of the United States and the world since 1985 and will be available in the Los Angeles area from August 11 to 18. REUTERS/Mario Anzuoni (UNITED STATES POLITICS HEALTH IMAGES OF THE DAY) 

People have their glucose and cholesterol levels checked at a free health screening at the Mayor's Back to School Fair in Dallas, Texas August 6, 2009. The fair provides free immunizations, hair cuts, vision, dental, and health screenings as well as free school supplies for those who meet federal poverty income requirements. REUTERS/Jessica Rinaldi (UNITED STATES SOCIETY HEALTH EDUCATION)