2345 E Southern Ave, Ste 101, Mesa, AZ 85204, US

(480) 893-2345

Family First Physicians

Welcome to Family First Physicians

Welcome to Family First Physicians

Welcome to Family First PhysiciansWelcome to Family First PhysiciansWelcome to Family First Physicians

Meet Our Providers

Dr. Allen Germaine


 Dr. Germaine has been practicing medicine since 1985. Working at other facilities, he knew he always wanted to be at a practice where patient care came first, so in 2005, he started Family First Physicians. He has experienced significant success treating chronic conditions such as diabetes, COPD, hypertension and vascular disease.  He works closely with specialists to ensure that his patients receive the very best care.  

Dr. Germaine is fluent in Spanish and German. 

Jennifer Dorn, FNP


 Jennifer has been working in healthcare since 2000. She has worked in cardiovascular intensive care, emergency room, pediatrics, and long-term care. Family practice has become her passion to effectively manage chronic conditions and provide holistic care to her patients. She believes in a team approach when providing care by utilizing specialists and including patient’s individual needs as part of the plan of care. She enjoys caring for patients through all stages of life. In her leisure time, Jennifer enjoys hiking, biking and kayaking.

Amber Valenzuela, PA-C


 Amber was born and raised in Mesa, AZ and is excited to be a providing care in the community that has always been home to her. She loves working with patients of all ages and their families to create a team-based approach to supporting individual wellness. Amber attended A.T. Still University in Mesa, AZ where she earned her Master of Physician Assistant Studies. Prior to her health career as a PA Amber was a teacher and she uses that passion for education to help patients better understand how to manage their health. In her spare time she enjoys traveling and spending time being a mom and relaxing with her family.  

Christopher Costello, PA-C


 Chris is a born native to the great state of Arizona. He  earned his Pre-Medicine Degree at Arizona State University and attended A.T. Still University for his Masters in Physician Assistant Studies. Chris is a member of the American Academy of Physician Assistants. Chris always knew he wanted to be a health care provider ever since he was young. His passion is helping people in the community achieve their personal best health. He believes in building positive relationships with patients, and creating effective  treatment plans to meet each individualized patients need. In his spare time, he enjoys traveling with his family, volunteering in the community, and playing his guitar. 

About Us

Our Mission

Since 2005, our goal has been to treat entire families and provide effective, efficient care. The practice has an open-door policy, offering scheduled visits, same day appointments and walk-in service for patients of all ages.  

Helpful Staff

Going to the doctor can be complicated and frustrating. We at Family First try to make it as easy as possible for you and your family. Our team is dedicated to helping you and your family feel at ease with your healthcare. 

Home Away from Home

Here at Family First, we are all family. As a patient, you join that large family. We strive to make you feel at home in our office. With our unique decor and friendly staff, the doctor can now be your home away from home.