Jose Arturo Lopez-Leon, Medical – (602) 279-5262, ext. 3441 – jleon@nachci.com. Erasmily Garcia, Medical – (602) 279-5262, ext. 3403 – egarcia@nachci.com. Gina Begay, Dental Customer Service – (602) 279-5262, ext. 3402. – vbegay@nachci.com. To make sure your New Patient Paperwork process goes smoothly, please take a moment to review ....