A crossmatch is a group of tests undertaken before a person requires a blood transfusion. The transfusion laboratory completes a group and screen to establish the person's blood group and identify any possible red cell antibodies that may be present in their blood.
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United Healthcare Phone Number. The number and steps below are voted #1 of 6 by over 3900 United Healthcare customers. 866-873-3902. United Healthcare phone support. Read key steps and hints below. They call you insteadNo waiting on hold. Free.his phone number is popular with other United Healthcare customers, but be sure to follow the 6 steps further down.