OneExchange: Customize your insurance

Towers Watson’s OneExchange is an Individual Medicare Market Exchange offered to OGB retirees and spouses who have Medicare Parts A and B. OneExchange offers a variety medical, prescription drug, and dental plans based on an individual’s provider preferences, prescription drug needs, geographic location and medical conditions. These plans may include Medicare Advantage, Medicare Supplement (or Medigap) and Medicare Part D Prescription Drug coverage.

Plan Advice and Enrollment Assistance

OneExchange gives you access to licensed benefit advisors and online tools combined with comprehensive knowledge of the Medicare market. Licensed benefit advisors are available to assist you before, during and after enrollment. You can contact benefit advisors at (855) 663-4228, Monday through Friday from 8:00 a.m. until 8:00 p.m. central standard time.

Program Eligibility

OneExchange provides personalized assistance to help you make informed and confident enrollment decisions and choose the health plan(s) that best fit your medical needs and budget. You are eligible for coverage through OneExchange if you are a retiree with Medicare Parts A and B.

OneExchange Health Reimbursement Arrangement (HRA)

Retirees enrolled in a medical plan through OneExchange receive a Health Reimbursement Arrangement. The OneExchange HRA allows for tax-free reimbursement of qualifying medical expenses to the extent that funds are available in the HRA account. HRA qualified health care expenses include copayments, deductibles and coinsurance and medical, dental, prescription drug, plan premiums and Medicare B premiums. A single retiree will receive HRA credits of $200 per month and a retiree plus spouse will receive HRA credits of $300 per month from the agency you retired.

Compare Plans

OneExchange offers a variety of tools to help you compare insurance plans and premiums. They also offer a Prescription Profilerâ„¢ that uses your current and projected medication expenses to determine which plans will have the lowest estimated annual out-of-pocket cost.

To contact OneExchange, please call (855) 663-4228 between 8:00 a.m. and 8:00 p.m. central standard time, Monday through Friday or to use the online plan comparison program, visit:




Email Customer Support


7:00 AM – 8:00 PM CT, Mon – Fri

Sampling of Plans Available through OneExchange


For a complete list of plans and providers visit: or call OneExchange at 1-855-663-4228.