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Gwendolyn A. McMillin, PhD, DABCC (CC,TC), FAACC
Scientific Director: Mass Spectrometry Platform
Medical Director: Clinical Toxicology
Professor, University of Utah School of Medicine
Doctorate Degree—Pharmacology, University of Utah
Fellowship—Clinical Chemistry, University of Utah
American Board of Clinical Chemistry (Clinical Chemistry, Toxicological Chemistry)
Newborn Drug Exposures
Past Chair Award, TDM and Toxicology Division, American Association for Clinical Chemistry, 2014
Ellis Benson Young Investigator Award, Academy of Clinical Laboratory Physicians and Scientists, 2012
Outstanding Speaker Award, American Association for Clinical Chemistry 2009, 2011, and 2013
McMillin GA, et al. A hybrid approach to urine drug testing using high-resolution mass spectrometry and select immunoassays. Am J Clin Pathol. 2015 Feb; 143(2):234–40.
McMillin GA, et al. Patterns of drugs and drug metabolites observed in meconium: what do they mean? Ther Drug Monit. 2015 Oct; 37(5):568–80. Kalman LV, et al.
Pharmacogenetic allele nomenclature: International workgroup recommendations for test result reporting. Clin Pharmacol Ther. 2016 Feb; 99(2):172–85. Haglock-Adler CJ, et al.
Development of a liquid chromatography-tandem mass spectrometry method to address the increased utilization of umbilical cord in the assessment of in utero drug exposure. Clin Biochem. 2016 Sep; 49(13–14):1092–5. Hyun G, et al.
Use of signals and systems engineering to improve the safety of warfarin initiation. J Thromb Thrombolysis. 2016 Nov; 42(4):529–33. Powers JL, et al.
Multigene and Drug Interaction Approach for Tamoxifen Metabolite Patterns Reveals Possible Involvement of CYP2C9, CYP2C19, and ABCB1. J Clin Pharmacol. 2016 Dec; 56(12):1570–81. Leung EY, et al.
Validation of an extensive CYP2D6 assay panel based on invader and TaqMan copy number assays. J Appl Lab Med. 2017 Mar; 1(5):471–82. Wu F, et al.
Stability of 21 cocaine, opioid, and benzodiazepine drug analytes in meconium at three temperatures. J Anal Toxicol. 2017 Apr 1;41(3):196–204. Gage BF, et al.
Effect of genotype-guided warfarin dosing on clinical events and anticoagulation control among patients undergoing hip or knee arthroplasty: The GIFT randomized clinical trial. JAMA. 2017 Sep 26; 318(12):1115–24. Wu F, et al.
Development of a liquid chromatography-tandem mass spectrometry method for the simultaneous determination of four cannabinoids in umbilical cord tissue. J Anal Toxicol. 2018 Jan 1; 42(1):42–8. Jannetto PJ, et al.
Executive summary: American Association of Clinical Chemistry Laboratory Medicine Practice Guideline – using clinical laboratory tests to monitor drug therapy in pain management patients. J Appl Lab Med. 2017 Dec ; 2(4):489–526.
McMillin GA. Pharmacogenetics of opioid use and implications for pain management – are we ready? J Appl Lab Med. 2017 Dec; 2(4):481–4. Scroggin TL,
McMillin GA. Quantitation of cocaine and metabolites, phencyclidine, butalbital and phenobarbital in meconium by liquid chromatography-tandem mass spectrometry. J Anal Toxicol. 2018 Apr 1; 42(3):177–82. Wabuyele SL, McMillin GA.
Quantitation of Ethyl-β-D-Glucuronide in human umbilical cord tissue by liquid chromatography tandem mass spectrometry (LC-MS/MS). Methods Mol Biol. 2019;1872:223–36. Wu F, Jensen TL, McMillin GA.
Detection of In utero cannabis exposure in umbilical cord tissue by a sensitive liquid chromatography-tandem mass spectrometry method. Methods Mol Biol. 2019;1872:211–22. Wu F, Melis R,
McMillin GA, Johnson-Davis KL (2019). Retrospective data analysis of the influence of age and sex on TPMT activity and its phenotype-genotype correlation. J Appl Lab Med. 2019 Mar;3(5):827–38. Metz TD, et al.
Prenatal marijuana use by self-report and umbilical cord sampling in a state with legalization. Obstet Gynecol. 2019 Jan;133(1):98–104. Melis R, et al.
Post-mortem CYP2D6 genotyping and copy number determinations using DNA extracted from archived FTA bloodstains. J Anal Toxicol. 2019 Jun 1;43(5):411–4. Jensen T, Wu F, McMillin G.
Detection of in Utero Exposure to Cannabis in Paired Umbilical Cord Tissue and Meconium by Liquid Chromatography-Tandem Mass Spectrometry. Clinic Mass Spectr. 2019;1872:211–22. Maharjan AS, et al.
The prevalence of DPYD*9A(c.85T>C) genotype and the genotype-phenotype correlation in patients with gastrointestinal malignancies treated with fluoropyrimidines: updated analysis. Clin Colorectal Cancer. 2019 Sep;18(3):e280–6. Wood KE,
McMillin GA, Krasowski MD. . Hosp Pediatr. Krasowski MD,
McMillin G, Melanson S, Dizon A, Magnani B, Snozek C (2019). Interpretation and Utility of Drug of Abuse Immunoassays: Lessons from Laboratory Drug Testing Surveys, Arch Pathol Lab Med, July. [Epub ahead of print] Gaedigk A, et al.
Characterization of reference materials for genetic testing of rare CYP2D6 alleles: a GeT-RM collaborative project. J Mol Diag. 2019 Nov;21(6):1034–52. Hoshitsuki K, Crews KR, Yang W, Smith CA, Hankins JS, Turner AJ, Broeckel U,
McMillin GA, Relling MV, Haidar CE (2019) Genet Med, Jul 25. Gage BF, et al.
Effect of low-intensity vs. standard-intensity warfarin prophylaxis on venous thromboembolism or death among patients undergoing hip or knee arthroplasty: a randomized clinical trial. 2019 Sep 3;322(9):834–42.