EHealth, an online health insurance provider, has announced that it has acquired the privately held PlanPrescriber. PlanPrescriber, which is based in Maynard, Mass., provides tools that allow seniors to select the Medicare plan best suited to their needs. The company’s shopping comparison tool allows Medicare-eligible seniors to peruse prescription drug and Medicare Advantage plans from providers nationwide.

With the help of PlanPrescriber’s comparison tool, available on the company’s Web site, seniors can see projected costs among competing plans based on the medications they have been prescribed, where they live and their Medicare status. The tool then provides them with plan options and estimated annual savings.

“The PlanPrescriber acquisition is highly strategic and a great example of what we are looking for in an acquisition partner,” said eHealth president and CEO Gary Lauer. “PlanPrescriber will help accelerate our penetration of the large and expanding senior market.”