How do I notify Meritage of a change to my billing or other information? Posted on October 16, 2019 Homepage > FAQ > How do I notify Meritage of a change to my billing or other information? Contact our Network Relations Department at 415-475-4821 or via email at: Marin County: mfleetwood@meritagemed.com Sonoma/Napa: kgustafson@meritagemed.com