Synchronous vs asynchronous visits: what the words mean and why they matter

Two programs can both say "online visit" and mean completely different things. One puts you on video with a clinician who asks questions and listens to the answers. The other has you fill in a form that a clinician approves later, sometimes in under a minute. The words for these are synchronous and asynchronous, and the difference decides how well you are screened.

Definitions

Synchronous means at the same time. A video call, a phone call, or a live text chat where both people are present and responding. The clinician can ask a follow-up question when your answer is ambiguous, hear how you describe a symptom, and see you if it is video.

Asynchronous means store and forward. You submit a questionnaire, photographs, or a message; a clinician reviews it later and responds. There is no conversation, only an exchange of documents. Most "get started in five minutes" intakes are asynchronous.

Many programs mix the two: an asynchronous intake, then a synchronous visit if the clinician wants one, then asynchronous follow-up. The question to ask is not "do you offer video" but "will a clinician speak with me before prescribing, and can I insist on it".

What guidance says

The FSMB 2022 telemedicine report says the standard of care in telemedicine should be equivalent to in-person care and that questionnaires alone are insufficient to establish the physician-patient relationship or make treatment decisions. It does not ban asynchronous care; it says the clinician must have enough information to meet the standard, and a form on its own usually does not supply it. The AMA's opinion 1.2.12 asks physicians to confirm that telemedicine is appropriate for the patient's needs and to obtain exams from on-site professionals when a personal examination is needed and not possible.

For GLP-1 therapy specifically, the things a good intake must catch are described in what a good intake includes: thyroid cancer and MEN 2 history, pancreatitis, gallbladder disease, pregnancy plans, and the other drugs you take. A well-designed form can ask all of that. What a form cannot do is notice that your answer to "any thyroid problems" was "not really" and ask what that means.

What your state requires

This is a legal question and it varies by state and by year. Some states require a synchronous audio-video encounter to establish a relationship before prescribing; some accept audio only; some allow asynchronous evaluation for certain conditions; and most have separate rules for controlled substances, which GLP-1s are not. Rather than restating rules that change, this site points to two references:

• formblendsdirectory.com, the state-by-state site in this network, which tracks telehealth prescribing rules alongside the pharmacy board and licence lookups for each state.
• The Center for Connected Health Policy's policy finder, the federally designated National Telehealth Policy Resource Center, which is the primary source those pages draw on.

Whatever the state allows is a floor, not a standard. A program may be legally permitted to prescribe from a form in your state and still be giving you thinner care than the guidance expects.

How to tell which one you are being offered

Read the program's own description of the process, then ask directly:

1. "Before a prescription is written, will I speak with a clinician by video or phone?"
2. "If the clinician decides a live visit is not needed, can I request one anyway, and does it cost more?"
3. "How long does the clinician's review of my intake usually take?" A review measured in seconds is a review of a checklist, not of you.
4. "For follow-up, is there ever a live visit, or is it all messaging?"

Write the answers down. If they conflict with what the website implied, that is a red flag in itself.

When asynchronous is reasonable

Once care is established, a routine titration check is largely a report from you: how the last four weeks went, what side effects, whether you want to step up. An asynchronous message can carry that, and the convenience is real. The moments that should pull you back to a live conversation are new or severe symptoms, a change in your other medication, a pregnancy plan, or any time you feel the plan is not being reviewed by a person. How follow-up should work lays out which is which.