Contact Us Mailing address: North Central Arizona Accountable Care P.O. Box 11090 Prescott, Arizona 86304-1090 Phone: (928) 772-3200 Fax: (928) 772-1527 Email: AGiardina@ncazaco.org Hours: M-F, 8:00 am to 5:00 pm Questions: For general questions or additional information about Accountable Care Organizations, please visit www.medicare.gov/acos.html or call 1-800-MEDICARE (1-800-633-4227). TTY users should call 1-877-486-2048. Write To Us If you have a question about North Central Arizona Accountable Care, please complete and submit the form below. We will be happy to contact you. Last Name * Click to add (?) First Name * Click to add (?) Email Address * Click to add (?) Comments/Questions * Click to add (?) Phone # Click to add (?) We respect your email privacy.