my doctor sends in specimens to be tested for chlamydia and gonorrhea. we send in the requisitions with an ICD10 code of Z113(encounter for screening for infections with a predominantly sexual mode of transmission). Quest has been sending letters stating: " Need Additional ICD10 -limited covered test". This in ONLY coming from tests covered by Molina Medicaid. Quest tells me they have nothing to do with it, it is from Molina. Molina doesn't seem to know what to tell me. Is there some other ICD10 code I should be using on these requisitions?