How do I find out if a doctor is on my insurance plan network?

To check that a Primary Care Physician (PCP), Specialist or Hospital is included in your health insurance carrier's network simply use the below links to the carriers' Find A Doctor area.  

Fallon Health:
http://www.fchp.org/FindPhysician/Search.aspx

Harvard Pilgrim Health Care:
http://www.providerlookuponline.com/harvardpilgrim/po7/Search.aspx

Health New England:
http://www.healthnewengland.com/Provider_lookUp/index.html

Neighborhood Health Plan:

https://www.nhp.org/member/doctor-smart/Pages/doctorsmart-directory.aspx

Tufts Direct (Network Health):
http://networkhealth.prismisp.com/

Tufts Health Plan:

https://tuftshealthplan.com/find-a-doctor

The most reliable source for confirming whether your provider is participating with your insurance carrier is your provider's billing department.