VHI is raising the price on 10 of its corporate plans by an average of 6.4% from April 15.
Corporate price plans are available to anyone who wants to sign up to them, and are often seen as offering more benefits and better value for money.
The four health insurers operating in Ireland have announced eight price rises so far this year.
The number of people paying for private health insurance has fallen by an estimated quarter of a million since 2007.