GNZ

BCBS Prefix GNZ

Blue Cross of Idaho

Idaho • HMO, Medicare Advantage, EPO

Billing essentials

Provider phone
(208) 286-3656
Electronic payer ID
BLUEC
Claims mailing address
P.O. Box 7408, Boise, ID 83707
Timely filing limit
180 daysCompare all plans
Prior authorization phone
(208) 395-8210

Coverage under prefix GNZ

HMO

HMO coverage means this member must use providers within the plan's network. A primary care physician serves as the care coordinator and must authorize specialist referrals. Emergency services are the primary exception to the network requirement. Always verify referral status before providing non-emergency specialty care.

Medicare Advantage

This prefix is associated with Medicare Advantage. MA plans combine hospital (Part A) and medical (Part B) coverage, and many include prescription drug coverage (Part D). When billing, confirm whether the plan uses the same payer ID for MA claims as for commercial claims, as many BCBS companies use separate IDs.

EPO

EPO coverage under this prefix means the member must use network providers but does not need referrals for specialist visits. This plan type is becoming more common as it offers lower premiums than PPO plans while providing more flexibility than HMOs. Verify network status before providing services.

About Blue Cross of Idaho

Independent licensee of the Blue Cross Blue Shield Association providing commercial, Medicare and Medicaid plans in Idaho.