Listed medical group Primary Health Care has reported good half-yearly results for its MedicalDirector clinical software division but has warned the government that it is exploring co-payments and out-of-pocket charges to make up for pressure on its earnings due to the Medicare rebate freeze and cuts to pathology and imaging incentives.

Total revenue for the period rose to $815.2 million in the six months to December 31, 2015, although profit was down by about $5 million to $50.1m.