Groupama Healthcare's new members' guide has been given the Plain English Campaign's Crystal Mark.
The award follows a review of policy wording and documentation by the provider, and recognises the Campaign's approval of a document's clarity.
From February group scheme members will receive a newly designed Crystal Mark accredited member's guide which includes a summary of their cover written in plain English.
The insurance company has also brought together its separate policy booklets to create one booklet for group schemes and one for individual products.
Alistair Sclare, director of healthcare at Groupama, said: "To achieve the Crystal Mark is a real milestone and a key element in our commitment to treating customers fairly.
"The Plain English Campaign has rigorous standards and will not award the Crystal Mark unless documentation can be read, understood and acted upon by the intended audience.
"This has been a valuable opportunity to go back to the drawing board and really make our documentation as clear, concise and user-friendly as possible for the benefit of our members, policyholders and our supporting healthcare broker partners," he added.