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In all states excapt North Carolina and South Carolina,Celtic Insurance Company uses Private Healthcare Systems (PHCS) at www.phcs.com as their preferred provider network. PHCS is part of Multiplan Inc., the nation's oldest and largest independent network-based cost management systems. Please see the network Web site for how to become a network provider or contact the Provider Relations Department at Private Healthcare Systems, Inc., 1100 Winter Street, Waltham, MA 02154; or call 1-800-950-7040.
In North Carolina and South Carolina the network is Medcost at http://www.medcost.com.
See the list of Frequently Asked Questions about Celtic Insurance