Patient Access Network Foundation. PO Box 2310. Mt. Clemens, MI 48046. Fax: 844-726-4728. Online: Patient portal. You can always call us at 1-866-316-7263 from Monday-Friday, 9 a.m. to 7 p.m. Eastern Time or use the online portal to verify if a claim has been paid, and how many days remain to submit a claim..