A healthcare providers' body has asked the government to release pending payments of over Rs 500 crore to more than 60 private hospitals under the Central Government Health Scheme, according to a statement on Wednesday. The Association of Healthcare Providers (APHI) said that it has written a letter to the Health Ministry to draw its attention towards the huge outstanding dues under the CGHS and sought release of the pending payments "on priority", saying it has badly impacted the financial sustainability of hospitals. The APHI, which represents leading healthcare providers in the country, also highlighted various anomalies such as inordinate delay in reimbursement to hospitals and low rates for reimbursement which have not been revised since 2014, in the present system.