Please use this link to access this publication. ABSTRACT Aims To estimate associations between both current- and prior-year medical cannabis dispensary densities and hospitalizations for cannabis use disorder in California, USA between 2013 and 2016. Design Spatial analysis of ZIP code-level hospitalization discharge data using Bayesian Poisson hierarchical space–time models over 4 years. Setting and cases California, USA from 2013 to 2016 (6832 space–time ZIP code units). Measurements We assessed associations of annual hospitalizations for cannabis use disorder [assignment of a primary or secondary code for cannabis abuse and/or dependence using ICD-9-CM or ICD-10-CM (outcome)] with the total number of medical cannabis dispensaries per square...