The Primary Group has bought Health for Industry (HFI), one of the UK's biggest independent healthcare consultancies, for an undisclosed amount.
Group marketing director John Bibby said Primary would use HFI to add new services to the group's international medical insurance provider Goodhealth Worldwide.
He said products would also be cross-sold between HFI and the group's other companies.
"We see enormous synergy between HFI's predominantly UK healthcare business and Primary's expatriate healthcare and personal lines business," Bibby said.
Bibby would not rule out breaking into the UK healthcare sector, but he said the company had no immediate plans to do so.
Christopher Claridge-Ware and Steve Morley-Ham set up HFI, which has a £50m gross annual turnover, in Farnborough in 1990.
The pair will remain joint managing directors and Bibby said there would be no redundancies among the company's 34 employees.
Bibby said Primary had not set specific profit targets for the consultancy but expected it to grow.
"We might end up funding acquisitions on its behalf, if they need that to grow," he said.
HFI has more than 500 corporate clients, to which it provides advice on private medical insurance, income protection, occupational health and health-related employee benefits.
Meanwhile, Primary Brokers Services made its first official appearance at the British Insurance Brokers' Association last week.
Chief executive Jonathan Davey said it received an excellent response from brokers.