51
          
        
        
          were youngpeopleunder 35 years old (dhss, 2014b). Enrollment surgedduring the special enrollment period,
        
        
          withover 900000newenrollments,manyofwhomwereyoungpeople. Inaddition to themore than8million
        
        
          people who signed up for insurance under a Health InsuranceMarketplace, numerous others have purchased
        
        
          off-marketplace plans. Estimates of the total decrease in the uninsured  population from 18 to 24 years old
        
        
          range from2.7% to4.7%.
        
        
          Theacaalsohadan important impact onenrollment in the
        
        
          
            Medicaid
          
        
        
          program. Growth in
        
        
          
            Medicaid
          
        
        
          enroll-
        
        
          ment has been strong, with a total of over 65million persons covered and an estimated 10% growth between
        
        
          the summer of 2013andApril 2014.Whileonlyabout half of states decided to take the federal funds available
        
        
          toexpand their
        
        
          
            Medicaid
          
        
        
          programs, thepublicityandoutreachunder theacawasexpected tohavesome impact
        
        
          on
        
        
          
            Medicaid
          
        
        
          inall states. Aswouldbeexpected, in the states that expanded
        
        
          
            Medicaid
          
        
        
          to covermore low-income
        
        
          adults, thegrowth inenrollment outpaced thenational averageandwas higher than in states that hadnot (15%
        
        
          vs 3.3%) (hkff, 2014). InCalifornia, enrollment increased by amonthly average of 19% from the pre-open en-
        
        
          rollment averageuntil June2014 (hkff, 2014b).
        
        
          Hispanic enrollment rates are also likely to be affected by the many undocumented workers and their
        
        
          families in their ranks. By excluding undocumented residents, the aca has little impact on rates of health insu-
        
        
          rance coverage for this vulnerablegroup that is themost uninsuredof anygroup. This provision implicitlyaffects
        
        
          Mexicans, above all other groups. It is estimated thatMexicansmake up59%of the undocumented population
        
        
          (Hoefer et al., 2013). Those who are undocumented are restricted from the subsidized programs of the aca,
        
        
          however, they can take advantage of health system improvements in other ways. For example, there is increa-
        
        
          sed funding available for community health centers, where services are often offered regardless of immigration
        
        
          status, andwhere1 in3patients isHispanic. Inaddition, agreater focusonpreventive careand theexpansionof
        
        
          freeor low-costpreventive treatmentswill improvemanagementofdiseases thatareprevalentamongHispanics.
        
        
          Improving health access for Hispanic andMexican immigrants in particular requires better understanding
        
        
          and addressing the barriers they face in enrolling for coverage. Special outreach and education efforts may be
        
        
          necessary to target mixed-status families. Removing the aca’s restrictions on the undocumented would help
        
        
          increaseHispanic enrollment in health insurance coverage. Given thatmost undocumented residents tend to be
        
        
          youngand ingoodhealth, expanding theaca to cover all residents, regardless of immigration status, would sup-
        
        
          portboth theHealth InsuranceMarketplacesand thehealthpreservationof these individuals.Anycomprehensive
        
        
          immigration reform should include a mechanism for access to affordable health services, either in the United
        
        
          Statesor in the countryof origin (segob, conapo, uc, 2013).
        
        
          
            chapter i i •
          
        
        
          
            access to health insurance and service use