Aetna

Aetna Medicare

Aetna Open Access

Aetna Select

Aetna Voluntary

Ascension Smart Health

Assurant Health

Baylor Scott & White Health Plans

Beechstreet

Blue Cross Blue Shield

Blue Cross Medicare Advantage

Cigna

First Health

Galaxy HealthCare

GEHA

HealthSmart

Humana

Humana Medicare

Medica Choice

Medicare

Multiplan

PHCS

Seton Health Plan

Tricare

UMR

United Health Care

United Health Care Medicare

USA Managed Care Organization