A study has found most New York medical centers are violating rules meant to help patients who cannot afford healthcare. The state’s Indigent Care Pool, which is funded partly by a surcharge on hospital bills, distributes more than $1 billion each year to help patients without insurance pay for medical care. But a study by the Community Service Society found two-thirds of hospitals whose aid applications were studied either violate the law, fail to comply with state guidance, or create additional barriers to assistance — despite receiving a combined total of more than $463 million for the program in 2010. Some hospitals did not even provide financial aid applications. The New York Times detailed the story of one uninsured patient who was sued by the hospital after she amassed $88,000 in hospital bills. That hospital had received more than $50 million that year to help care for uninsured patients.