Nicholl has been licensed for two and a half years, shadowing DA for about half a year at various offices. She completed her education at Loma Vista adult education. When not working she enjoys spending time with her family, hiking, and exercising.   

Christopher Nucho

Registered Dental Hygienist

Chris is our Hygienist with over 10 years of experience.  He completed the Hygiene program at West Los Angeles College and obtained his Master's in Dental Hygiene at UC, San Francisco.  When not at N Street Dental, Chris enjoys bicycling, kayaking, and hiking and spending time outdoors, like the beach or mountains (Lake Takoe) with his family.


Practice Operations Manager

Patricia obtained in Bachelor's degree in Business Marketing from James Madison University in Virginia.  Prior to working with Dr. Barretto and Dr. Wong three years ago, Patricia worked as a Human Resources professional for 10 years.  When she's not working, Patricia enjoys spending quality with her husband and two young daughters and her crazy Boston Terrier, Dexter. 

Lindsey O'Hearn

Front Office Coordinator 

Lindsey is our Front Office Coordinator  with  8 years of customer service and 4 years of medical field  experience. She completed her Certified Nursing Assistant and Associates Degrees at Napa Valley College and Sac Med School and possesses the skills to create a great patient experience with the knowledge she has gained throughout her career. When not at W and B Dental, Lindsey enjoys traveling, boating, or spending time at home or out and about with her family, dog Brodie, and friends

Omar Yaacoobi

Office Assistant

After completing his education at University of California,  Davis, Omar joined our team to pursue his goal that is dental school. He seamlessly integrated into our team through his fast learning and attention to detail in order to help provide the best experience for the patient. When not at W&B Dental, Omar enjoys going to the gym, playing soccer, or spending time at home with his family and 3 cats. 

Joycy Cruz

Registered Dental Hygienist

Joy graduated from Carrington College, San Jose for dental hygiene. Joy Cruz have been in the dental field for 9 years and was an RDA in the previous years and strives to provide the highest standard of care, individualized to my patient's dental needs. She strongly believes in quality patient relationship through patient education to achieve optimum oral health. She is a people person and loves learning from her patients while guiding them to help achieve their dental goals. While not working, she loves to travel.

Mayra Suh

Registered Dental Hygienist

Mayra has been a registered dental hygienist for 19 years.  She is a strong advocate of preventing and controlling oral disease. She graduated from the University Of Illinois College Of Dentistry – Dental hygiene program. Mayra received an award for the Most Improved Clinician in her graduating class.

For 19 years, she has been educating patients about oral disease and motivating them of the benefit of good oral health. Her exceptional patient rapport, extensive experience and high clinical standards were sought out by the University of Illinois College of Dentistry Restorative Department/implant clinic.  She was the first Dental Hygienist to implement a hygiene recall system and soft tissue management program for the prosthodontic residents.

Mayra’s optimal goal is to continue to bring the highest preventive and therapeutic oral care to the Bay Area residents.  She has been living in California since 2014 and joined the practice in 2015.

Mayra is a former Chicago resident and is fluent in Spanish.  On her free time she enjoys working out, cooking and weekend get away to wine country .  She lives in Danville and enjoys spending quality time with her husband and two Maltese dogs, Sparkie and Bunnie.

Our Office


2121 Ygnacio Valley Road, E-202, Walnut Creek, CA 94598

Working Hours:
Monday-Wednesday: 7:30 am - 4:30 pm Thursday-Friday: 7:30 am - 3:30 pm Saturday-Sunday: Closed