C8W

BCBS Prefix C8W

Blue Cross and Blue Shield of Massachusetts

Massachusetts • Medicare Advantage, Traditional Indemnity, HMO

Billing essentials

Provider phone
(800) 443-6657
Electronic payer ID
00200
Claims mailing address
P.O. Box 986030, Boston MA 02298
Timely filing limit
180 daysCompare all plans
Prior authorization phone
(800) 443-6657

Coverage under prefix C8W

Medicare Advantage

This prefix includes Medicare Advantage coverage. MA plans follow CMS guidelines for timely filing (365 days from date of service), which may differ from the commercial plan's deadline. The payer ID for Medicare Advantage claims may differ from the standard commercial payer ID. Verify before submitting.

Traditional Indemnity

Traditional indemnity coverage means the member has fee-for-service insurance with no network limitations. Any licensed provider can be seen without referrals. Claims are reimbursed based on usual, customary, and reasonable (UCR) charges. The member typically pays a deductible and a percentage of allowed charges.

HMO

This is a Health Maintenance Organization (HMO) prefix. HMO plans have stricter routing requirements than PPO plans. Members select a PCP who manages their care and issues referrals. Claims for specialist services should include the referral number. Out-of-network claims will typically be denied unless emergency criteria are met.

About Blue Cross and Blue Shield of Massachusetts

Independent licensee serving Massachusetts members with commercial, Medicare and Medicaid plans.