For your patient's safety and your convenience, Seattle Radiologists now offers in house creatinine testing. Our lab equipment is CLIA waived State licensed and our technologists are specifically trained to perform the lab draws. Your patient's creatinine level can be obtained in 12 minutes at our facility. We take the creatinine value and use the National Kidney Foundations eGFR calculator and then follow our policy to determine if any contrast dosages should be lowered or eliminated. Our policy is: