M4K

BCBS Prefix M4K

Blue Cross Blue Shield of Arizona

Arizona • High-Deductible Health Plan (HDHP), Medicare Advantage, EPO

Billing essentials

Provider phone
(844) 995-2583
Electronic payer ID
53589
Claims mailing address
P.O. Box 2924, Phoenix, AZ 85062-2924
Timely filing limit
180 daysCompare all plans
Prior authorization phone
(602) 864-4320

Coverage under prefix M4K

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.

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.

EPO

Under this EPO prefix, the member has no out-of-network coverage for routine care. However, unlike HMO plans, no referral is needed to see a specialist within the network. When billing, confirm the provider's network participation status with the plan before submitting the claim.

About Blue Cross Blue Shield of Arizona

Non-profit health insurance company and independent licensee of the Blue Cross Blue Shield Association serving more than 2 million members across Arizona with commercial, Medicaid, and Medicare plans.