Uninsured consumers are being urged to enroll for annual medical coverage under the Affordable Care Act ahead of Sunday's open enrollment deadline. Heading into the deadline, reports indicated Latinos remain among the most uninsured.

"This is the fourth quarter of enrollment and the clock is ticking for consumers to take action and enroll in coverage through the Health Insurance Marketplace before the final deadline," said Anne Filipic, President of healthcare enrollment coalition Enroll America, in a press release.

ACA - better known as Obamacare - insures at least 17.6 million Americans, nearly one-third of which are people of color. Last year, the U.S. Department of Health and Human Services said Latinos make up about 4.2 million of recipients; a 11.5 percent drop between October 2013 and September 2015.

Latinos and African-Americans are still more likely to be uninsured than other groups. Enroll America cites a recent Robert Wood Johnson Foundation survey that found 63 percent of Spanish-speakers want to talk with someone about health options, but 80 percent did not even log on to the plan's HealthCare.gov website for more information.

Over three-fourths of Latino participants either did not know or understand what tax credits were available for them.

As part of a country-wide effort to inform younger consumers and minorities about their options, Enroll America partnered with the HHS to visit Historically Black Colleges and Universities -- as well as Greek fraternities and sororities -- to urge students about the looming deadline, warning increased fines for not having health care.

Days ahead of the Jan. 31 deadline, Enroll America is making sure the message is not lost on Latinos. Their Get Covered America program has travelled across the country offering enrollment assistance to Spanish speakers.

Last weekend in Colorado, they teamed up with Denver-based Servicios de la Raza and the Aurora Community Assistance Network to provide multilingual help. Nearly 70 percent of attendees received Spanish assistance.

"We're working hard to make sure consumers understand that it's their last chance, there is financial help available, and if they don't get covered, they not only run the risk of running up high medical bills, but may also face a fine of at least $695," Filipic said.

The penalty for not buying is either $695 per adult or 2.5 percent of the annual household income. Those who do not meet one of a limited list of exemptions must pay the penalty when filing 2016 federal income tax.

Unlike previous enrollment periods during ACA's five-year history, HHS has made it clear a Special Enrollment Period will not be offered ahead of the April 15 tax filing deadline.