This review was undertaken to examine the impact of a standards-based, mandated accreditation process on several aspects of echocardiographic service delivery in a single-payer, previously unregulated environment. In the province of Ontario, virtually all echocardiographic services are funded by the Ministry of Health and Long Term Care. The Echocardiography Quality Improvement (EQI) process was introduced in 2012 and subsequently linked formally to reimbursement in 2016. Previously, payment for echocardiographic services in Ontario was unregulated. The impact of EQI on the number of facilities, echocardiographic volumes, costs, quality standards, and physician service provision were compared before and after implementation. Of the initial 1,045 registrants, 604 (57.8%) have been accredited or accreditation is expected having successfully resolved identified deficiencies. The remaining registrants were either never functionally operating (323 [30.9%]) or have withdrawn services (118 [11.3%]) since mandatory registration became a requirement for reimbursement. A number of factors identified facilities that were able to most promptly meet EQI standards, including hospital-based, academic, and multiple-physician facilities. The average annual increase in the utilization of echocardiographic services before EQI was 6.7%, decreasing to 2.7% since. The proportion of repeat examinations decreased in community-based facilities. Since 2013, costs for echocardiographic services have totaled about $92.3 million less than predicted by pre-2012 trends. To address standards, some small, more isolated facilities sought out alliances with larger facilities, particularly those affiliated with academic hospitals. EQI is demonstrably a means for improving quality while reducing the rate of growth and repeat examinations.