About Banner

Who We Are

Ruth Letizia

Ruth E. Letizia, MD
I graduated from New York Medical College in 1998 and completed my Pediatric residency at Georgetown University Medical Center in 2001.  I worked in private practice in Northern Virginia for five years and moved to Arizona in 2006.   I opened our practice in November 2008, to help meet the growing need for quality pediatric care in the rapidly expanding east valley, especially for children with special health care needs.  I am married, with four beautiful children. My spare time is devoted to being a wife and a mom.  We are active in our church, but I love to read novels and cross-stitch when I have a few minutes to myself.

D. Annie Nguyen, MD
I am the first person in my Vietnamese family to be born in USA. I am a proud Texan who graduated of UT Austin and I completed medical school at UTMB in Galveston. I moved to Phoenix for pediatric residency at St Joseph Hospital and spent 6 months at Riley Children Hospital training in Adolescent Medicine. For last 5 yr I was a pediatric hospital doctor at Phoenix Children’s and Banner Desert Cardon’s. I am expanding my focus to outpatient medicine by joining Sonoran Sky and enjoy all kid’s especially helping with lactation issues. I only have one, almost 3 yr son. My family enjoys international traveling, hiking and camping as much as possible.

Catherine Lance, PA-C
I was born in Florida but spent the majority of my childhood overseas in Africa and Central America before coming back to the United States for college. I obtained my undergraduate from John Brown University in Siloam Springs, Arkansas and my masters from Harding University in Searcy, Arkansas. My husband and I moved out to the Phoenix area in July 2016. My husband and I enjoy hiking, camping and any outdoor recreational activity. My passion in medicine lies in the pediatric population and I am excited to join the team at Sonoran Sky Pediatrics.

Roberta “Bobbi” Moorehouse, CPNP
Bobbie is a native of upstate New York and received her Bachelor of Science in Nursing from the University at Albany. She moved to Arizona to pursue her Master of Science degree in Community Health Nursing from ASU. As a nurse she had experience in general hospital care and emergency services. She moved into pediatrics, working as a school nurse for 16 years. It was her work with children as a school nurse that led her to return to ASU and obtain a post graduate certificate as a pediatric nurse practitioner in 1998. She gained board certification soon after . As a PNP she has worked in private pediatric practices for a number of years but also spent time working with indigent children in school based clinics in Mesa, AZ. Bobbie considers herself privileged to be able to work with children and her patients are very special to her. Bobbie is married and has 2 adult children. She is very involved in fitness and health and has competed in a variety of sports. She loves weightlifting, outdoor activities, travel, and enjoys photography as a hobby.