You might find the follwing links useful for your professional activity:
Blue Cross and Blue Shield Federal Plan www.fepblue.org
Empire Blue Cross and Blue Shield (New York) www.empireblue.com
GHI www.ghi.com
1199SEIU www.1199seiu.org
Cigna www.cigna.com
Aetna www.aetna.com
Atlantis www.healthplanone.com/healthinsurancecarriers/atlantis
Affinity www.affinityplan.org
EmblemHealth www.emblemhealth.com
HIP www.hipusa.com
HealthCare Partners www.healthcarepartners.com
Touchstone www.touchstoneinsurance.ca
Fidelis www.fideliscare.org
HealthNet www.healthnet.com
Magnacare www.magnacarerx.com
Neighborhood Health www.getnhp.com
Oxford www.oxhp.com
Pomco www.pomcogroup.com
Wellcare www.wellcare.com
Tricare (Military HealthPlan) www.tricare.mil