I need to have a completed field auto filled later in the pdf

[JKamen]

For example, someone will need to enter "patient name" only once and every subsequent field will auto fill with same information.

[gkaiseril]

Fields with the same field name and type share the same value. If you need the patient name read only on the other pages then you need to use a different field name for the field on the subsequet pages and a custom JavaScript to update the second form field(s).

I would use the input form field's "Action" of On Blur" to run the following script:'

this.getField("LockedNameField").value = event.value;

You may need to change the :LockedNameField" to the name of the other field.