RAPAMYCIN (SIROLIMUS), BLOOD

RAPID PLASMA REAGIN (RPR), BLOOD

RAPID STREP, GROUP A ONLY

REDUCING SUBSTANCES, FECES

REDUCING SUBSTANCES, URINE

RENAL FUNCTION PANEL

RENIN ACTIVITY, BLOOD

RESPIRATORY ALLERGY PROFILE, CHILD, BLOOD

RESPIRATORY ALLERGY PROFILE, INFANT, BLOOD

RESPIRATORY SYNCYTIAL VIRUS (RSV) ANTIBODIES, IgG AND IgM (SEPARATE DETERMINATIONS), SERUM

RETICULIN ANTIBODIES, SERUM

RETICULOCYTE COUNT, BLOOD

RETINOL BINDING PROTEINS, BLOOD

RETT’S SYNDROME (MECP2 SEQUENCING)

RHEUMATOID FACTOR, QUALITATIVE, PLEURAL FLUID OR SYNOVIAL FLUID

RHEUMATOID FACTOR, QUANTITATIVE, SERUM

RICKETTSIAL PANEL

ROCKY MOUNTAIN SPOTTED FEVER ANTIBODIES, IgG AND IgM, SERUM

ROTAVIRUS, ANTIGEN

RUBELLA ANTIBODIES, IgG ONLY, BLOOD

RUBELLA ANTIBODIES, IgM ONLY, SERUM

RUBEOLA (MEASLES) ANTIBODIES, IgG AND IgM (SEPARATE DETERMINATIONS), SERUM

RUBEOLA (MEASLES) ANTIBODIES, IgG AND IgM (SEPARATE DETERMINATIONS), SPINAL FLUID