Skip to main content
Kamisha L. Johnson-Davis, PhD, DABCC (CC, TC)
Medical Director: Clinical Toxicology
Professor (Clinical), University of Utah School of Medicine
Specialties
Therapeutic drug monitoring
Drug screening
Neonatal drug testing
Trace and toxic elements
Education
Doctorate Degree—Pharmacology, University of Utah
Fellowship—Center for Human Toxicology
Fellowship—Clinical Chemistry, University of Utah
Certification/Affiliations
American Board of Clinical Chemistry (Clinical Chemistry, Toxicological Chemistry)
Certification of Qualification, New York State Department of Health
Research Interests
Assay development for drug testing by mass spectrometry and immunoassay
Therapeutic drug monitoring in pediatric and adult patients
Drug testing in oral fluid
Awards
Travel Scholarship, AAMC Minority Faculty Career Development Seminar, 2014
International Travel Grant, International Association of Therapeutic Drug Monitoring and Clinical Toxicology (IATDMCT), 16th Congress, 2018
Recent Publications
Petrides AK, et al. The development and validation of a turbulent flow-liquid chromatography-tandem mass spectrometric method for the simultaneous quantification of citalopram, sertraline, bupropion and hydroxybupropion in serum . Clin Biochem . 2014 Oct;47 (15):73–9.
Lin CN, Juenke JM, Johnson-Davis KL . Method validation of a tricyclic antidepressant drug panel in urine by UPLC-MS/MS . Ann Clin Lab Sci . 2014 Fall;44 (4):431–6.
Marin SJ, et al. Comparison of drug detection by three quadrupole time-of-flight mass spectrometry platforms . J Anal Toxicol . 2015 Mar;39 (2):89–95.
Rule GS, Rockwood AL, Johnson-Davis KL . LC-MS/MS method for determination of teriflunomide, over a 40,000-fold dynamic range using overlapping calibrators . Ther Drug Monit . 2015 Aug;37 (4):472–8.
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.
Johnson-Davis KL , et al. Everolimus method comparison between Waters MassTrak™ Immunosuppressants XE (IUO) kit and an in-house laboratory developed LC-MS/MS method in renal transplant patients . Ann Clin Lab Sci . 2015 Winter;45 (1):27–31
Schniedewind B, et al. Long-term cross-validation of everolimus therapeutic drug monitoring assays: the Zortracker study . Ther Drug Monit . 2015 Jun;37 (3):296–303.
Johnson-Davis KL , Slawson MH. Ethyl Glucuronide positivity rate in a pain management population . J Anal Toxicol . 2015 Nov-Dec;39(9):686–90.
Marin SJ, et al. One hundred false-positive amphetamine specimens characterized by liquid chromatography time-of-flight mass spectrometry . J Anal Toxicol . 2016 Jan-Feb;40 (1):37–42.
Johnson-Davis KL , Sadler AJ, Genzen JR. A retrospective analysis of urine drugs of abuse immunoassay true positive rates at a National Reference Laboratory . J Anal Toxicol . 2016 Mar;40 (2):97–107.
Yang HS, Wu AH, Johnson-Davis KL . Development and validation of an LC-MS/MS sulfonylurea assay for hypoglycemia cases in the emergency department . Clin Chim Acta . 2016 Feb 15;454 : 130–4.
Dasgupta A, Khalil SA, Johnson-Davis KL . analytical performance evaluation of a new cobas tacrolimus assay on cobas e411 analyzer: comparison of values obtained by the cmia tacrolimus assay and a liquid chromatography combined with tandem mass spectrometric method . Ann Clin Lab Sci . 2016 Spring;46 (2):204–8.
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.
Dasgupta A, et al. Effect of carbamazepine 10, 11-epoxide on serum carbamazepine measurement using a new CMIA assay: comparison of values obtained by using PETINIA, CEDIA and liquid chromatography combined with tandem mass spectrometry . Ann Clin Lab Sci . 2016 May;46 (3):242–6.
Barakauskas VE, et al. Process optimization to improve immunosuppressant drug testing turnaround time . Am J Clin Pathol . 2016 Aug;146 (2):182–90.
Wong SH, et al. Everolimus TDM using Thermo Fisher QMS immunoassay on Indiko, Beckman DxC, AU680, and AU5800 analyzers . J Clin Biochem . 2017 May;50(7–8):425–30.
Wu F, Slawson MH, Johnson-Davis KL . Metabolic patterns of fentanyl, meperidine, methylphenidate, tapentadol and tramadol observed in urine, serum or plasma . J Anal Toxicol . 2017 May 1;41 (4):289–99.
Merrigan SD, et al
Wu F, et al. 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.