MRK

BCBS Prefix MRK

Blue Cross and Blue Shield of Massachusetts

Massachusetts • Medicaid, High-Deductible Health Plan (HDHP), PPO

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 MRK

Medicaid

Under this prefix, the member may have Medicaid coverage managed by this BCBS plan. Medicaid claims have specific rules around cost-sharing, balance billing, and timely filing that override the plan's standard commercial policies. Contact the plan's Medicaid provider services line for submission details.

HDHP

HDHP (High-Deductible Health Plan) coverage means the member has a higher deductible than traditional plans, often paired with a Health Savings Account (HSA). Most services require the member to pay out-of-pocket until the deductible is met. Preventive care is typically covered before the deductible. Submit claims normally to the payer listed above.

PPO

This is a Preferred Provider Organization (PPO) prefix. PPO plans are the most common BCBS plan type. Members have the freedom to self-refer to specialists. Claims for in-network services are typically processed faster and reimbursed at higher rates than out-of-network claims.

About Blue Cross and Blue Shield of Massachusetts

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