You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
    <allredirects garcontinue="Medical_Billing" />
      <page pageid="87" ns="0" title="Certified Coding Specialist - Physician Based" />
      <page pageid="96" ns="0" title="Clearing House" />
      <page pageid="139" ns="0" title="HIPAA" />
      <page pageid="144" ns="0" title="Healthcare Financial Management Association" />
      <page pageid="25" ns="0" title="ICD-10" />
      <page pageid="172" ns="0" title="ICD-9-CM" />
      <page pageid="180" ns="0" title="MEDICAID" />
      <page pageid="186" ns="0" title="MEDICAL CODING" />
      <page pageid="187" ns="0" title="MEDICAL INSURANCE (PART B)" />
      <page pageid="167" ns="0" title="MEDICARE" />