TEXAS (CBSDFW.COM/AP) – Insurers can no longer reject customers with expensive medical conditions thanks to the health care overhaul. But consumer advocates warn that companies are still using wiggle room to discourage the sickest — and costliest — patients from enrolling.

Some insurers are excluding well-known cancer centers from the list of providers they cover under a plan; requiring patients to make large, initial payments for HIV medications; or delaying participation in public insurance exchanges created by the overhaul.

Advocates and industry insiders say these practices may dissuade the neediest from signing up and make it likelier that the customers these insurers do serve will be healthier — and less expensive.

“It’s the same insurance companies that are up to the same strategies: Take in as much premium as possible and pay out as little as possible,” said Jerry Flanagan, an attorney with the advocacy group Consumer Watchdog.

Insurers acknowledge that people may see changes in coverage, driven in part by how the overhaul affects insurance. But they say prudent business practices, not discrimination against the sick, are key factors behind some of the trends that have raised concerns.

They point out that if customers find a plan they don’t like, they generally have plenty of additional options to choose from both on and off the exchanges.

They also note that the overhaul takes several steps to discourage them from avoiding costly patients. It prevents insurers from marketing or designing a plan that would discourage someone from applying based on their health.

It also calls for insurers to chip into a pool that compensates competitors who wind up with a more expensive patient population. That lowers their incentive for discouraging the sick from enrolling.

“Health plans now guarantee coverage for individuals and families regardless of health status,” said Clare Krusing, a spokeswoman for the trade association America’s Health Insurance Plans, or AHIP.

There are three major ways insurers still might steer sick or expensive patients away from their coverage:

— FORM NARROW NETWORKS

Insurers can lower their chances for covering patients with expensive medical conditions like cancer and autism simply by limiting the number of doctors and hospitals in a coverage network. That would send those patients searching for coverage elsewhere because they don’t want to pay expensive, out-of-network rates.

Narrow insurer networks might include only 30 percent or less of a market’s hospitals, as opposed to 70 percent or more for a broader network, according to the consulting firm McKinsey & Co.

These narrow networks have grown more common in recent years, especially in coverage sold on new public health insurance exchanges created by the overhaul.

An Associated Press survey of the nation’s top cancer centers this spring found that patients covered under the health care law could encounter barriers to access in many cases. For instance, MD Anderson Cancer Center in Houston, ranked as one of U.S. News & World Report’s “Best Hospitals” every year since 190, said it is included in the networks of less than half of the plans sold on the area’s public insurance exchange.

Aside from excluding patients, narrow networks also can help insurers form a healthy customer base by lowering the cost of coverage. A narrow provider network gives insurers leverage to squeeze better rates out of doctors who want to be included in that network in order to get the insurer’s business.

Better rates lead to lower premiums, and young and healthy people generally shop for insurance based on price.

“They’re the ones that don’t check the provider directory,” said Bob Laszewski, a former insurance executive turned industry consultant.

Insurers say plans with narrow networks are among many coverage choices consumers can make when they shop for insurance, and they are not an attempt to dodge the sick.

Narrow provider networks help maximize value by grouping providers “who have a track record of delivering high-quality, cost-effective care,” said Krusing, the AHIP spokeswoman.

She added that insurers who sell coverage on the overhaul’s public insurance exchanges have to offer more than one plan. It would make little sense for them to steer patients away from one plan when that person could just choose another option from the same insurer with broader benefits.

The overhaul sets some standards for provider networks, and a Centers for Medicare and Medicaid Services spokesman said regulators plan to increase their review of these networks for 2015 to figure out whether they need to strengthen requirements.

— CAUSE PRESCRIPTION STICKER SHOCK

Some plans are requiring patients to initially pay 30 percent or more of the bill for drugs that can cost several thousand dollars a month. HIV drugs and multiple sclerosis medications are among them.

The overhaul caps the annual amounts patients are required to pay for these so-called out-of-pocket expenses. Still, some say the higher cost-sharing requirements can steer patients that need these medications away from enrolling.

“It’s another way to send a message to sicker patients that says, ‘If you’re taking these medications, we’d rather not sell insurance to you,” Flanagan said.

The AIDS Institute filed a complaint with U.S. Health and Human Services department earlier this summer against four Florida insurance companies over the issue.

Insurers say their plans follow HHS guidelines and cover all medically necessary HIV drugs. They also note that the price patients pay reflects, to some degree, what drugmakers charge for their medications.

Insurers also say customers have options if they find a prescription plan they dislike. In some markets, a customer may have more than a dozen choices, some of which might offer better coverage or a lower-cost alternative for their prescriptions.

But AIDS Institute Deputy Executive Director Carl Schmid said he worries that patient choices will dissolve over time if the high prescription payments spread to other insurers in a market, and “the good plans will become the bad plans.”

— ENTER MARKETS CAUTIOUSLY

Another way insurers might land a healthier population is by playing the waiting game.

The nation’s largest health insurer, UnitedHealth Group Inc., will dive into the overhaul’s public insurance exchanges with plans to sell 2015 individual coverage in 24 exchanges. That’s up from only four in 2014.

These exchanges debuted last fall and offer shoppers a chance to compare and buy policies, often with help from an income-based tax credit.

UnitedHealth’s delayed growth could be a savvy way to avoid some of the sickest patients who likely rushed to sign up for insurance in the initial year of the exchanges, said Laszewski, the industry consultant.

That could free UnitedHealth to enter markets and sign up healthier patients after other insurers, most likely nonprofits with deep community roots, have “taken the bullet” the first year, he said.

Health insurers are still figuring out plan options for 2015, so there are no signs yet that other insurers are following UnitedHealth’s example.

UnitedHealth said it had always planned a measured approach. It needed a year to set up provider networks and see how the exchanges worked in their debut before deciding whether to plunge in deeper. Spokesman Tyler Mason said the insurer wasn’t waiting for those competitors to sign up all the sick patients first.

“Philosophically, we’ve always said the marketplaces would evolve over time and that they would be good markets and that reform is needed,” he said.

(©2014 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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