Xylazine-Fentanyl Positivity and Concentration in Urine Drug Tests - Top-Institutions - MDSpire

Xylazine-Fentanyl Positivity and Concentration in Urine Drug Tests

  • By

  • Olivia K. Sugarman

  • Charles Marks

  • Penn Whitley

  • Brendan Saloner

  • Danielle German

  • July 9, 2026

  • 0 min

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Top Institutions in Family Medicine

Brief introduction explaining scope and methodology.

  • #1

    Millennium Health
    Millennium Health

    San Diego, California

    Key Differentiators

    • Toxicology

  • #2

    College of American Pathologists
    College of American Pathologists

    Northfield, Illinois

    Key Differentiators

    • Pathology
    • Laboratory Medicine

  • #3

    Johns Hopkins Bloomberg School of Public Health
    Johns Hopkins Bloomberg School of Public Health

    Baltimore, Maryland

    Key Differentiators

    • Public Health
    • Epidemiology

Original Source(s)

Xylazine-Fentanyl Positivity and Concentration in Urine Drug Tests

  • by Olivia K. Sugarman, Charles Marks, Penn Whitley, Brendan Saloner, Danielle German

  • July 9, 2026

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