Excel to XML: Need to add/edit nested tags

So I'm currently trying to make an application that imports data from excel file and then converts it into XML. The basic flow of my code (C#) is to import the data from excel file into a dataTable -> dataSet and then convert it to XML using DataSet.GetXml Method. Since I'm getting the tags of the XML from the row 1 of the excel file (the headings), my XML output looks like this right now:

<practitionerGroup>
  <practitionerDesignation>MD</practitionerDesignation>
  <firstName>JOHN</firstName>
  <middleInitial />
  <lastName>DOE</lastName>
  <addressLine1>1532 N 7TH ST</addressLine1>
  <addressLine2>STE 156</addressLine2>
  <city>TERRE HAUTE</city>
  <state>IN</state>
  <zip>47807</zip>
  <ZIP_TEXT>47807</ZIP_TEXT>
  <tradeNameDosage>EstroGel 0.06%</tradeNameDosage>
  <pkgSize>50g in 1 Bottle Pump</pkgSize>
  <pkgQtyReq>10</pkgQtyReq>
  <pkgQtyDist>10</pkgQtyDist>
  <hasReqSignature>Y</hasReqSignature>
  <hasReceiptSignature>Y</hasReceiptSignature>
</practitionerGroup>

However, I need to make the XML tags to look like this:

<practitionerGroup>
        <practitioner>
            <practitionerDesignation>NP</practitionerDesignation>
            <person>
                <firstName>JANE</firstName>
                <lastName>DOE</lastName>
                <middleInitial></middleInitial>
            </person>
            <personAddress>
                <addressLine1>2741 DEBARR ROAD</addressLine1>
                <addressLine2>STE 312</addressLine2>
                <city>ANCHORAGE</city>
                <state>AK</state>
                <zip>99508</zip>
            </personAddress>
        </practitioner>
        <tradeNameDosage>EstroGel 50g Starter Unit</tradeNameDosage>
        <pkgSize>50g in 1 Bottle Pump</pkgSize>
        <pkgQtyReq>5</pkgQtyReq>
        <hasReqSignature>Y</hasReqSignature>
        <pkgQtyDist>5</pkgQtyDist>
        <hasReceiptSignature>Y</hasReceiptSignature>
</practitionerGroup> 

Whats the best way to modify the XML tags format? Thanks.