The nation's second-biggest health insurer, Indianapolis-based WellPoint Inc., is dipping a toe in the medical tourism marketplace. Starting in January, WellPoint will offer employees of Wisconsin-based Serigraph Inc. the option of traveling to India for nonemergency procedures. Serigraph will waive the insurance deductible and coinsurance for employees who agree to go, paying all medical costs as well as travel expenses for the patient and a companion.