Insurer directory
Twenty of the largest US health insurers, each linked to their public medical policy library, utilization management bulletins, prior-authorization list, and provider directory — for both commercial and Medicaid plans where applicable.
UnitedHealthcare
UnitedHealth Group
One of the largest US commercial insurers; also operates UHC Community Plan for Medicaid in many states.
Anthem Blue Cross Blue Shield
Elevance Health
Elevance operates Anthem BCBS plans in 14 states and Medicaid plans under multiple brands.
Aetna
CVS Health
Aetna publishes Clinical Policy Bulletins (CPBs) — among the most accessible commercial medical policy libraries.
Cigna Healthcare
The Cigna Group
Cigna publishes Coverage Policies for medical, drug, and dental services.
Humana
Major Medicare Advantage carrier; also commercial and TRICARE.
Centene (Ambetter / WellCare)
Centene Corporation
Largest US Medicaid managed-care operator; also marketplace (Ambetter) and Medicare (WellCare).
Kaiser Permanente
Integrated payer-provider; medical policies are region-specific.
Health Care Service Corporation
HCSC
Operates Blue Cross Blue Shield plans in 5 states; largest customer-owned health insurer in the US.
Molina Healthcare
Medicaid-focused managed care across 17+ states; also marketplace and Medicare.
Florida Blue
GuideWell
Florida's BCBS licensee; publishes medical coverage guidelines.
Highmark Blue Cross Blue Shield
BCBS plans in PA, WV, DE, and western NY.
Blue Cross Blue Shield of Michigan
Michigan's largest insurer; publishes detailed medical policies.
Independence Blue Cross
BCBS plan serving the greater Philadelphia region.
CareFirst BlueCross BlueShield
BCBS plan for Maryland, DC, and Northern Virginia.
Horizon Blue Cross Blue Shield of NJ
New Jersey's largest health insurer; commercial and Medicaid (Horizon NJ Health).
Blue Cross NC
North Carolina's BCBS licensee with public corporate medical policies.
Blue Shield of California
California Blue Shield licensee with detailed medical policy library.
Premera Blue Cross
BCBS plan for Washington and Alaska.
Regence BlueCross BlueShield
Cambia Health Solutions
BCBS plans across the Pacific Northwest.
Health Net
Centene Corporation
California-focused commercial and Medi-Cal managed care.