subject: G6PD Deficiency [print this page] In most of the cases of G6PD deficiency, the condition goes undetected until the individual develops severe symptoms. In the initial period after diagnosis, the doctor will prescribe certain tests like a complete blood count, the Coombs test, tests for liver enzymes, lactate dehydrogenase and haptoglobin tests, and more. Once a diagnosis is made, then the doctor will know the degree of the deficiency and will be able to prescribe a proper program of treatment to get the best results for the patient.