Curriculum Vitae

Hello! I'm a Research Fellow in the Department of Epidemiology and Applied Clinical Research at University College London. Under the supervision of Professor David Osborn, my research involves the analysis of electronic patient health records to explore outcomes in people who access secondary mental health services in the London boroughs of Camden and Islington.

As part of my work, I manage and administer the Camden and Islington NHS Foundation Trust's Clinical Record Interactive Search (CRIS) research database, including the development of linkages with other datasets, such as Hospital Episode Statistics (HES), mortality data from the Office for National Statistics (ONS), and the National Cancer Registration and Analysis Service (NCRAS) to enrich analyses of CRIS data. I also apply natural language processing tools and techniques, such as CogStack, to analyse clinical free text. Lately, I have also been examining substance-related disorders and comorbid psychiatric conditions, including depression and severe mental illness, utilising real-world patient data through the Clinical Practice Research Datalink (CPRD).

My doctoral research was conducted under the supervision of Professor Carol Brayne and Dr. Andres Roman-Urrestarazu at the University of Cambridge. My dissertation elucidated the social and economic epidemiology of substance use disorders and their treatment through the analysis of administrative and routinely collected data, namely, the National Survey for Drug Use and Health, the Treatment Episode Data Set, and the National Survey of Substance Abuse Treatment Services. Prior to my PhD, I was a Senior Associate in Avalere Health's Market Access and Reimbursement practice where I helped advise life sciences companies, charitable foundations, and patient advocacy groups on issues pertaining to coding, coverage, and payment for drugs, biologics, and medical devices.


  • PhD in Public Health and Primary Care, University of Cambridge (Aug 2019)

  • MSPH in Health Policy, Johns Hopkins University (Jun 2015)

  • BSc in Biology, University of British Columbia (May 2012)

  • BA in English, University of British Columbia (May 2012)


Neicun J, Yang JC, Shih H, Nadella P, van Kessel R, Negri A, Czabanowska K, Brayne C, and Roman-Urrestarazu A. "Lifetime prevalence of Novel Psychoactive Substances Use Among Adults in the USA: sociodemographic, mental health and illicit drug use correlates. Evidence from a Population-Based Survey 2007-2014." PLoS One 15(10), 2020.

Yang JC, Roman-Urrestarazu, A, and Brayne C. "Responses among substance abuse treatment providers to the opioid epidemic in the USA: Variations in buprenorphine and methadone treatment by geography, operational, and payment characteristics, 2007-16." PLoS One 15(3), 2020.

Yang JC, Roman-Urrestarazu, A and Brayne C. "Differences in Receipt of Opioid Agonist Treatment and Time to Enter Treatment for Opioid Use Disorder Among Specialty Addiction Programs in the United States, 2014-17." PLoS One 14(12), 2019.

Yang JC, Roman-Urrestarazu A, McKee M, and Brayne C. "Demographic, socioeconomic, and health correlates of unmet need for mental health treatment in the United States, 2002–16: evidence from the national surveys on drug use and health." IJEH 18(122), 2019.

Rosner B, Neicun J, Yang JC, and Roman-Urrestarazu A. "Opioid prescription patterns in Germany and the global opioid epidemic: Systematic review of available evidence." PLoS One 14(8), 2019.

Neicun J, Steenhuizen M, van Kessel R, Yang JC, Negri A, Czabanowska K, Corazza O, and Roman-Urrestarazu A. "Mapping novel psychoactive substances policy in the EU: The case of Portugal, the Netherlands, Czech Republic, Poland, the United Kingdom and Sweden." PLoS One 14(6), 2019.

Roman-Urrestarazu A, Yang JC, Robertson R, McCallum A, Gray C, McKee M, and Middleton J. "Brexit threatens the UK’s ability to tackle illicit drugs and organised crime: What needs to happen now?." Health Policy 123(6), 2019.

Prilutskaya M, Yang JC, Roman-Urrestarazu A. "Synthetic Cannabinoids, Opioids, and Polydrug Use: Clinical Implications." in Handbook of Novel Psychoactive Substances: What Clinicians Should Know About NPS (Eds. Corazza O, and Roman-Urrestarazu A.), 2019.

Roman-Urrestarazu A, Robertson R, Yang JC, McCallum A, Gray C, McKee M, and Middleton J. "European Monitoring Centre for Drugs and Drug Addiction has a vital role in the UK’s ability to respond to illicit drugs and organised crime." BMJ 362, 2018.

Roman-Urrestarazu A, Yang JC, Ettelt S, Thalmann I, Seguel Ravest V, and Brayne C. "Private health insurance in Germany and Chile: two stories of co-existence, segmentation and conflict." IJEH 17(112), 2018.

Yang JC, Roman-Urrestarazu A, and Brayne C. "Binge alcohol and substance use across birth cohorts and the global financial crisis in the United States." PLoS One 13(6), 2018.

Peer Review Activities

  • American Journal of Men's Health

  • The American Journal on Addictions

  • Applied Economics

  • Health and Quality of Life Outcomes

  • International Journal for Equity in Health

  • Journal of Psychopharmacology

  • Substance Abuse: Research and Treatment

  • Substance Abuse Treatment, Prevention, and Policy


Yang JC, and Roman-Urrestarazu A. "Self-reported use of novel psychoactive substances in the United States from 2007-14: trends in prevalence and user characteristics from the national surveys on drug use and health." Fifth international conference on novel psychoactive substances. 2017.


UCL Division of Psychiatry

Maple House - 6th Floor

149 Tottenham Court Road