1. AMA Telehealth Quick Guide https://www.ama-assn.org/practice-management/digital/ama-telehealth-quick-guide. Accessed 22 Jul 2020.
2. American Medical Association: CPT 2020 Professional Edition. 5th ed., revised Chicago (IL) AMA, 2019.
3. Billing & Coding by Type of Visit https://www.acponline.org/practice-resources/business-resources/telehealth/physician-video-visits Accessed 22 Jul 2020.
4. Telehealth Services. https://www.cms.gov/Outreach-and-Education/Medicare-Learning-Network-MLN/MLNProducts/Downloads/TelehealthSrvcsfctsht.pdf Accessed 22 Jul 2020.