There are typically two types of telehealth/telephone triage positions available: those for generalists (i.e., who are able to take calls from those of any age or sex, with any type of condition) and those for specialists (e.g., at cardiac centers, children's hospitals) – "specialists" may mean either those who do telephone triage for a specific condition or range of conditions, or those who are involved with disease management.
Since you were a specialist (diabetes) before entering the corporate world, and since you have been out of healthcare/clinical practice for seven years, employers may be reluctant to hire you into generalist roles right away. Therefore, I suspect that your best options would likely be one of the following – look for opportunities at diabetes specialty centers or with outpatient programs for diabetes patients (particularly newly diagnosed patients), or get your hands back into clinical work and apply for generalist roles. You may want to use a