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Dr. Johnson is on Doximity

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Education & Training

  • Scripps Mercy Hospital
    Scripps Mercy HospitalResidency, Internal Medicine, 1988 - 1988
  • Scripps Mercy Hospital
    Scripps Mercy HospitalResidency, Internal Medicine, 1984 - 1987
  • University of Wisconsin School of Medicine & Public Health
    University of Wisconsin School of Medicine & Public HealthClass of 1984

Certifications & Licensure

  • CA State Medical License
    CA State Medical License 1985 - 2024
  • American Board of Internal Medicine Internal Medicine

Publications & Presentations

PubMed

Grant Support

  • Genetics Study Of Nicotine Dependence In African AmericansNational Institute On Drug Abuse2009–2012
  • Genome-Wide Association Study Of Heroin Abuse: A Multiethnic StudyNational Institute On Drug Abuse2011
  • Genome-Wide Association Study Of HIV-1 Host Genetics Among Injection Drug UsersNational Institute On Drug Abuse2008–2011
  • Genome-Wide Association Study Of Heroin Abuse: A Multiethnic StudyNational Institute On Drug Abuse2009–2010
  • Examining Pathways Among Co-Occurring Mental And Substance Use DisordersNational Institute On Drug Abuse2006–2007
  • Pathway Among Co-Occurring Mental/Substance Use DisorderNational Institute On Drug Abuse2005
  • Epidemiology Of Insomnia &Mental Illness In AdolescenceNational Institute Of Mental Health2004
  • Epidemiology Of Insomnia &Mental Illness In AdolescenceNational Institute Of Mental Health2000–2003
  • Alcoholism TypologyNational Institute On Alcohol Abuse And Alcoholism1998–1999

Professional Memberships

Hospital Affiliations