Client Service Center: +1 877 886 4334

Frequently Asked Questions


  • Phone payments are accepted by contacting our Client Services team Toll Free at 1-877-886-4334, Monday - Thursday 8:30 am to 7:00 pm EST and Friday 8:30 am to 6:00 pm EST.
  • Credit cards accepted are Visa (max $4000), MasterCard and Discover. Fees are assessed based on the amount of the payment.
  • Electronic checks (E-Checks) are accepted; no fees are applicable.
  • Mail payment to the P.O. Box address indicated on your invoice.
  • Send a request for us to process a single payment via E-Check or credit card for a specific amount via email to [email protected] or via Fax to 954-449-6481. Please send a copy of a voided check or the credit card (with cardholder name, billing address, expiration date and CVV code).
  • For Guarantee Insurance Company policies, you can set up monthly installments to be withdrawn via Electronic Funds Transfer (EFT) by completing the necessary EFT Authorization Form. Contact Client Services for this form. You will continue to receive invoices as a pre-notification of the pending withdrawal 20 days before it’s due.
  • You can view policy payment information by clicking here
  • If the effective date of the cancellation has passed, then underwriting review and approval will be required in order to reinstate. Making payment will not guarantee reinstatement approval.
  • Your agent should assist with contacting the underwriter to request approval to reinstate and if approved, assist you with complying with the requirements.
  • Payment can be accepted by mail or by phone at toll free 1-877-886-4334.
  • Medical bills can be submitted to this address:
    P.O. BOX 1160
    CANONSBURG, PA 15317
    FAX (724) 745-6960
    Customer Service (888) 350-1150
  • *Nevada residents must send their bills to: 2654 W Horizon Ridge Pkwy PMB 270 Henderson, NV 89052
  • To expedite the processing, please include the claim #, Employee’s social security number, Date of Injury and Employer Name.
  • Contact the adjuster named in the correspondence you have received,
  • Or, contact our Call Center Toll Free at 1-877-886-4334 to find out which Regional Claims Office is handling your claim.
  • If you are a medical provider, contact MCMC Customer Service Toll Free at 1-888-350-1150.
Mail the bill with any related medical notes to us in care of our bill review partner:
P.O. BOX 1160
FAX (724) 745-6960
Customer Service (888) 350-1150 or fax it to MCMC at (724) 745-6960.

To expedite processing, please include the Claim Number, Employee's Social Security Number, Date of Injury and Employer Name.

  • Please mail additional documentation to your claims adjuster.