Tim Kelsey is to leave Dr Foster and Dr Foster Intelligence – the firm’s joint venture with the Information Centre – later this year, it has been announced.

Mr Kelsey co-founded Dr Foster in 2000, and has been chair of the executive board of Dr Foster Intelligence since it was set up in 2006.

He is expected to leave in May and will join McKinsey and Company to work on the consultant’s international health projects.

Mr Kelsey will not be replaced and Dr Foster Intelligence chief executive Tom Moloney, who joined in 2007, will lead the organisation.

Mr Kelsey said in a statement he had decided to “dedicate myself to promoting the strategic power of information and knowledge to improve quality and efficiency in international health and public services”.

The Information Centre has said it will create a “level playing field” among information providers in coming months by publishing open methodologies for indicators, some of which had previously been provided by Dr Foster Intelligence.

Information Centre chief executive Tim Straughan said the company had grown quickly in recent years and would continue to do so. He said quality indicators and performance would be a “big growth area” and “that is the space they work in”.

“They are very good at what they do and have expertise in this field,” said Mr Straughan.

The publication of Dr Foster’s annual hospital guide last year, which which gave trusts a score for patient safety from 0 to 100, prompted strong criticism from some in the NHS. They said it undermined public confidence in the health service and in the quality regulation system.