CAD tip # 12616:

However, if you have a drawing with blocks (e.g. survey points) coming from an external source, all lying in a plane (Z=0), and you need to move these blocks to the actual elevations specified by a numeric value in one of their attributes, you can use the freeware LISP utility Att2elev.

Download the application from Download, load it into AutoCAD with the APPLOAD command and invoke it by typing the command ATT2ELEV.

Then select a specific attribute that contains the elevation data. If its numeric value is preceded by a prefix or ends with a suffix (e.g. "123.4m"), you can specify the extra text ("m") to ignore it when determining the elevation. Then by selecting the block references or by confirming "all", the blocks of the same type will be moved to the heights specified by the values ​​of these attributes.