There are many companies that people in the Physician Side Gigs group work for, with many more popping up on what seems like a regular basis. One of the first things to consider is whether you're bringing your own patients or whether you need somebody else to source patients for you. If you have a patient referral source in place, there are several free or relatively cost efficient programs to consider. If you are joining a bigger company to offer care to their patients, considerations include whether you'll need your own malpractice, how many patients they are able to offer you, how long the average consultation takes, and how many state licenses that you will need (there are some companies that can help you with this, and some of the bigger companies will help you).
The American Telemedicine Association:
Of particular use is the state policy resource center page: https://www.americantelemed.org/policy-page/state-policy-resource-center
The Center for Connected Health Policy: