Aetna Health and Life Insurance Company
Coventry Health and Life Insurance Company
Chickering Claims Administrators, Inc.
HealthCare USA of Missouri, Inc.
First Health Group Corp.
First Health Life & Insurance Company
Claims Administration Corp.
Cambridge Life Insurance Company
Aetna Global Benefits (Europe) Limited
Mental Health Associates, Inc.
Aetna Health Insurance Company of Europe Limited
MHNet Life and Health Insurance Company
American Health Holdings, Inc.
Meritain Health, Inc.
Prime Net, Inc.
Strategic Resource Company
American Continental Insurance Company
Continental Life Insurance Company of Brentwood Tennessee
Innovation Health Plan, Inc.
Innovation Health Insurance Company
Blue Cross and Blue Shield of Alabama
Blue Cross and Blue Shield of Illinois
Blue Cross and Blue Shield of Kansas
Blue Cross and Blue Shield of Louisiana
Blue Cross Blue Shield Massachusetts, Medicare Advantage
Blue Cross Blue Shield of Massachusetts
Blue Cross and Blue Shield of Michigan
Blue Cross Blue Shield of North Dakota
Blue Shield of CA
CareFirst BlueCross BlueShield
Cigna Care Network
Great West Healthcare – Cigna Open Access Plus
SAMBA Federal Health Plan
Fallon Community Health Plan
Gundersen Health Plan
Hawaii Medicare Service Association
Health Alliance Medical Plans, Inc.
HealthChoice of Oklahoma
Health Plus of Louisiana
Healthsmart WTC Program
Highmark Medicare Advantage Plans
Highmark Blue Cross Blue Shield
Highmark Blue Cross Blue Delaware
Highmark Blue Cross Blue West Virginia
Highmark Blue Shield
Keystone Health Plan West Inc.
Independence Blue Cross
Memorial Integrated Health Plan
MVP Health Plan, Inc.
New Mexico Health Connections
Northeast Medical Services
The Ohio State University Health Plan Inc.
Pacific Independent Physician Association
Physicians Health Plan of Northern Indiana
Premera Blue Cross
Priority Health Managed Benefits, Inc.
Providence Health Plan
QCA Health Plan, Inc.
Sanford Health Plan
Sentara Health Plans, Inc.
Sharp Rees Stealy
Tufts Associated Health Maintenance Organization, Inc./Total Health Plan, Inc.
United Healthcare Insurance Company
AARP Medicare Complete
All Savers Insurance
American Medical Security
Care Improvement Plus
GEHA-United Healthcare Goldenrule
Health Plan of Nevada
Oxford Health Plans
The Empire Plan
UMR United Medical Resources
United Health Integrated Services
United Healthcare Great Lakes Health Plan
United Healthcare Harvard Pilgrim Health Care (HPHC)
United Healthcare Medicare Solutions
United Healthcare Oxford
United Healthcare Student Resources
Wellmark Health Plan of Iowa, Inc.
Wellmark of South Dakota, Inc.