Meet The Providers

Who We Are

At Angel Pediatrics, we provide personal, friendly service in a fun and caring environment for children of all ages. All of our doctors are Board Certified Pediatricians and have worked in the medical industry for a number of years. Our services range from diagnosis, to health and fitness analysis. Whether your child is sick or needs to tips on how to stay healthy, we can help them.

Dr. David S. Yip, M.D., F.A.A.P.

Dr. Yip was born and raised in Southern California. He attended medical school at Saint Louis University in St. Louis, MO and graduated in 1998. He completed his pediatric residency in 2001 from the University of Texas Southwestern/Children's Medical Center of Dallas.

After moving to Arizona, Dr. Yip worked at Arrowhead Pediatrics from 2001-2005.

He lives in North Peoria with his wife and one cat. Dr. Yip's interests include horses, horse racing and ice hockey.

Mary M. (Maggie) Guerin R.N., M.S.N., F.N.P.-C

Maggie is a Board-Certified Family Nurse Practitioner. She was born in Colorado, grew up in New Mexico, and has called Phoenix her home since 1993. She graduated from West Texas State University in 1978 with a Bachelor of Science in Nursing, and graduated from Grand Canyon University in 2009, with a Master of Science in Nursing Leadership, and earned a Post Graduate Certificate Family Nurse Practitioner in 2011. Maggie is passionate about caring for families and children throughout the lifespan. She worked in the hospital arena as an RN for 25 years and for the past 11 years has worked as a Nurse Practitioner for multiple pediatric practices around the valley. Maggie retired in 2020 and now works part time for Angel Pediatrics. She enjoys spending time with her family, reading, camping and being outdoors.

Victoria (Vicki) S Simpson, R.N.,B.S.N., M.S.N. , CPNP

Vicki is a Board Certified Pediatric Nurse Practitioner. She was born in Phoenix, AZ. She graduated from Northern Arizona University with her Bachelor of Science in Nursing in 1979, and her Master of Science/Pediatric Nurse Practitioner in 1983. Vicki his passionate about care for children and families. She worked at another Pediatric practice for 32 years before retiring and joining Angel Pediatrics, part time in 2017. She is married and has two grown daughters. Vicki loves spending time with her family, reading, scrapbooking, playing with her dogs, and traveling the world.

Danielle Scott, RN, BSN, MSN, CPNP-PC

mary johnson

Danielle is a board-certified Pediatric Nurse Practitioner. She graduated from Regis College with her Master's of Science, Pediatric Nurse Practitioner. Prior to joining Angel Pediatrics, she worked at Banner University Medical Center, Phoenix in the NICU, and Phoenix Children's Hospital as a critical care float pool RN. Danielle was born and raised in Valencia, California. She enjoys spending time with her family, boyfriend, and dog, going on hikes, physical fitness, and drawing. Her favorite places to visit are the beach and the lake.

Tara Pierce, RN, BSN, MSN, CPNP-PC


Tara Pierce is a Certified Pediatric Nurse Practitioner who began her career as a Registered Nurse at Phoenix Children's Hospital where she gained valuable experience working on the gastrointestinal/respiratory floors as well as the emergency department.  She then went on to obtain her Master of Science in Nursing degree from Arizona State University where she graduated Magna Cum Laude in 2009.  Tara is passionate about her patients and feels privileged to have the opportunity to care for your children.  In her free time, Tara enjoys spending time with her two daughters (ages 10 and 12), as well as most outdoor activities such as hiking, biking and running.

Our Location

Office Hours


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm