Telehealth is not a specialty; it is an ordinary medical practice conducted across a state line, and nearly every legal problem it creates comes from that single fact. This article explains why the law places the practice where the patient sits, and what that means for licensure, malpractice, prescribing, and payment. It walks through the licensure compacts and exceptions that make multistate practice workable, the controlled substance rules that survived a decade of temporary flexibilities, and the reimbursement rules that determine whether a visit gets paid. It then covers the standard of care question that has no settled answer, the privacy layer that applies differently to platforms than to providers, and the business structures that run into corporate practice restrictions. It closes with the recurring failure modes in telehealth practices and the diligence that prevents them.