Missouri is one of a handful of states where we do not think the law is clear enough to rely on. The one-party rule people usually quote for Missouri is written for telephone calls, and the provision covering spoken conversation is read by at least one respected legal guide as requiring everyone's agreement, so the guidance below takes the stricter of the two readings.
The short answer
Treat Missouri as a state where everyone in the room has to agree before you record. The familiar rule that one person's agreement is enough is written for phone calls, and it is not safe to assume it carries over to a conversation in an exam room, so ask before you record.
What the law says
The governing statute is Mo. Ann. Stat. § 542.402.
The exception people rely on when they say Missouri only needs one person's agreement is written for wire communications, which is to say telephone calls. A conversation in an exam room is not a telephone call.
The provision that does cover spoken conversation is read by at least one respected legal guide as requiring everyone's agreement where the people talking reasonably expect privacy. Because the two readings point different ways, the safe course is to ask.
Treat this one carefully
This state's rule is not as clear-cut as the others, for the reasons above. Asking before you record costs you one sentence and removes the question entirely. That is the recommendation here.
How to ask
Because Missouri needs everyone's agreement, ask the room rather than one person. A nurse, a resident, a scribe, or an interpreter is part of the conversation too.
One sentence usually does it:
“Before we start, would everyone be alright if I record the part where you tell me what to do next? I want to get the instructions right when I'm at home.”
If it would make you more comfortable, start the recording by saying the date, noting that you asked, and letting people say yes on the recording. Then the consent sits in the same file as the conversation.
If your provider says no
Take the no. Providers are allowed to decline, some health systems have a blanket policy, and recording over an objection turns a simple request into a problem.
- Ask them to write the instructions down, or to print an after-visit summary before you leave.
- Take notes on the instructions only. You don't need the whole conversation.
- Write it up right after, in the parking lot rather than that evening. Memory fades fastest in the first hour.
- Bring someone whose job for that visit is listening for the practical details.
The Rootwise App works either way. Record it or type up what happened, and you get the same plain-language summary and task list.
Recording is optional in Rootwise
Record the whole visit, record only the instructions at the end, or record nothing and type up what happened afterward. You get the same plain-language summary and calendar-ready task list from any of them.
Join the Early Access ListThis is general information, not legal advice. Recording statutes get amended, and courts reinterpret them. How one applies to your situation depends on facts this page can't know, and nothing here creates an attorney-client relationship. If the answer matters to a decision you're about to make, talk to a lawyer licensed in Missouri.
Reviewed August 2026. Rootwise does not diagnose, treat, or advise, and does not provide legal services.