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.

National

Anthem Blue Cross Blue Shield

Elevance Health

Elevance operates Anthem BCBS plans in 14 states and Medicaid plans under multiple brands.

CACOCTGAINKY+8

Aetna

CVS Health

Aetna publishes Clinical Policy Bulletins (CPBs) — among the most accessible commercial medical policy libraries.

National

Cigna Healthcare

The Cigna Group

Cigna publishes Coverage Policies for medical, drug, and dental services.

National

Humana

Major Medicare Advantage carrier; also commercial and TRICARE.

National

Centene (Ambetter / WellCare)

Centene Corporation

Largest US Medicaid managed-care operator; also marketplace (Ambetter) and Medicare (WellCare).

National

Kaiser Permanente

Integrated payer-provider; medical policies are region-specific.

CACOGAHIMDOR+3

Health Care Service Corporation

HCSC

Operates Blue Cross Blue Shield plans in 5 states; largest customer-owned health insurer in the US.

ILTXNMOKMT

Molina Healthcare

Medicaid-focused managed care across 17+ states; also marketplace and Medicare.

CAFLIDILKYMI+11

Florida Blue

GuideWell

Florida's BCBS licensee; publishes medical coverage guidelines.

FL

Highmark Blue Cross Blue Shield

BCBS plans in PA, WV, DE, and western NY.

DENYPAWV

Blue Cross Blue Shield of Michigan

Michigan's largest insurer; publishes detailed medical policies.

MI

Independence Blue Cross

BCBS plan serving the greater Philadelphia region.

PANJDE

CareFirst BlueCross BlueShield

BCBS plan for Maryland, DC, and Northern Virginia.

MDVADC

Horizon Blue Cross Blue Shield of NJ

New Jersey's largest health insurer; commercial and Medicaid (Horizon NJ Health).

NJ

Blue Cross NC

North Carolina's BCBS licensee with public corporate medical policies.

NC

Blue Shield of California

California Blue Shield licensee with detailed medical policy library.

CA

Premera Blue Cross

BCBS plan for Washington and Alaska.

WAAK

Regence BlueCross BlueShield

Cambia Health Solutions

BCBS plans across the Pacific Northwest.

IDORUTWA

Health Net

Centene Corporation

California-focused commercial and Medi-Cal managed care.

CA