MRA is your back office medical billing service for independent practices Our expertise in proper coding, filing and resolving claims is important when you consider that as much as 20% to 35% of all insurance coding submitted is incorrect. This means you could be losing valuable revenue, which threatens the very independence you enjoy. MRA has over 30 years experience in medical billing and coding. And many of our clients have been with us over 20 years. You don’t have to hassle with coding, billing and managing the employees who do the billing. Leave it to the experts instead.