Thought your hospital room was dirty? Did your nurse sometimes ignore you? If so, the hospital has a new reason to worry: Patient gripes soon will affect how much hospitals get paid by Medicare.

The Centers for Medicare & Medicaid Services is finalizing details for the new reimbursement method, required by last year’s health-care law. Consumer advocates say tying scores from patient-satisfaction surveys to payments will result in better care. But many hospital officials are wary, arguing the scores don’t necessarily reflect the quality of the care and are influenced by factors beyond their control.

Medicare has been publishing patient-satisfaction scores on its Hospital Compare Web site since 2008 but hasn’t used them to adjust payments. Under CMS’s proposal, Medicare will begin withholding 1 percent of its payments to hospitals starting in October 2012. That money — $850 million in the first year —will go into a pool to be doled out as bonuses to hospitals that score above average on several measures. The agency is poised to release the final rule.

This may hurt hospitals in regions where patients tend to render less-than-glowing judgments. In the District and New York state, only 59 percent of patients give their hospital experiences a top rating, lower than anywhere else except the Virgin Islands. Nationally, an average of 67 percent of patients give their hospitals a top rating.

Under the proposal, patient scores would determine 30 percent of the bonuses, while clinical measures for basic quality care would set the rest.

“These are hard scores to improve, and I think that’s why hospitals get frustrated,” said Dale Shaller, a Minnesota health-care researcher who oversees the national patient survey database for the federal government. Hospitals argue that the scores should have less weight but nevertheless are trying to figure out how to improve their rankings.

No one is sure why hospitals in some regions fare more poorly than those in other parts. One theory: These hospitals treat lots of patients with multiple ailments, leading to worse reviews. CMS says it adjusts its ratings to take this into account. Teaching hospitals and other large hospitals also get worse patient evaluations than do small community hospitals, some research shows.

Hard-to-measure cultural factors also may play a role. Northeasterners, for example, may be harder to please than Midwesterners and Southerners. Hospitals in South Dakota, Nebraska, Louisiana and Iowa are at the top of hospital patient reviews, according to Hospital Compare.

Hospitals conduct the surveys of recently discharged people, including those too young to be on Medicare. Questions include whether nurses and doctors always communicated well; whether the patients always received help as soon as they wanted; whether their pain was always well controlled; whether their rooms and bathrooms were clean; whether they got explanations about medications; and whether they got directions on what to do after leaving the hospital.

The District’s hospitals lag on many of the specific questions. For instance, about two-thirds of recently discharged patients at George Washington University Hospital reported nurses always communicated well. That was 10 percentage points below the national average. At United Medical Center in Southeast, 64 percent of patients said they were given instructions on what to do after leaving the hospital, 18 points below average.

Chris Jordan, director of quality management at George Washington Hospital, said his hospital has been improving its patient ratings this year. “I can guarantee you that we’ll get better,” he said.

Some Maryland hospitals also have some lower-than-average scores. At Shady Grove Adventist Hospital in Rockville, 39 percent of patients said they always received help as soon as they wanted, 25 points below average. At Laurel Regional Hospital, 55 percent of patients said their rooms and bathrooms were always clean, 16 points below average.

“We’re not where we ought to be,” said Dennis Hansen, Shady Grove’s president. To improve satisfaction, nurses now check in with patients every hour.

In New York City, three nationally known teaching hospitals — Beth Israel Medical Center, NYU Langone Medical Center and the Mount Sinai Medical Center — scored below average. Even NewYork-Presbyterian Hospital, which did better than average on its overall rating, still scored below average on specific questions.

“Because we have such cultural diversity, such literacy variability and such large and very complex hospitals, for us to always hit it out of the park is very difficult,” said Jaclyn Mucaria, a senior vice president at NewYork-Presbyterian.

Dr. James Merlino, chief experience officer of the Cleveland Clinic, which scores below average on seven of nine key patient-satisfaction questions, said doctors and nurses have done their own studies and concluded that very sick and depressed patients give skewed views. Very ill patients are less likely to report that nurses check in on them every hour — even when logs prove they did, he said.

But low patient ratings often spring from real shortcomings, said Jodie Cunningham, of Press Ganey, a company that administers the surveys for many hospitals. She said poor ratings can be caused by bad employee morale or bed shortages that force patients to remain in emergency rooms for hours before being admitted.

Consumer advocates, who want CMS to give even greater weight to the patient views, said the payment changes, even if imperfect, will spur improvement.

“If we go at the rate many providers would like us to go, we’ll be having the same conversation in 10 years,” said Debra Ness, president of the National Partnership for Women and Families, a Washington nonprofit.

Kaiser Health News is an editorially independent news service of the Kaiser Family Foundation, a nonpartisan health-care-policy organization that isn’t affiliated with Kaiser Permanente.