---
title: "ADT A31 - Update An Existing Record"
canonical: "https://wiki.patientsknowbest.com/space/api/3365078195/ADT%20A31%20-%20Update%20An%20Existing%20Record"
format: markdown
---
> Macro (toc)

# Overview

This is functionally equivalent to an[ ](http://www.google.com/url?q=http%3A%2F%2Fdev.patientsknowbest.com%2Fhome%2Fhl7-api%2Fmessages%2Fadt-a28&sa=D&sntz=1&usg=AOvVaw1RRWSodObNjNOq89v2aDvj)<u>[ADT A28](https://wiki.patientsknowbest.com/space/api/3365078168/ADT+A28)</u>. Both messages will create the specified medical record (if not found), else update the existing medical record.