Figure. Cohort Flow Diagram of Methadone Clinics Contacted in the US and Canada in 2020.

^aExcluded because of clinic request for individual identification (ie, Medicaid plan number) preventing data collection.

^bStandardized patient calls were made simulating a patient aged 30 years seeking to start methadone treatment. Within the US, clinics were contacted twice: once as a patient with Medicaid and once as a patient with no health insurance (self-pay). Within Canada, clinics were contacted once as a patient with provincial insurance.