Local Hearing Experts
Trusted Hearing Care for Walnut Creek and Brentwood
Contra Costa Hearing Aid Center is a locally owned hearing aid center founded in 2008 by Toby S. Hill, a Board Certified Hearing Instrument Specialist with more than 20 years in hearing healthcare. After years on the manufacturing side of the industry, Toby found his real passion in working directly with people. Since then, our team has helped thousands across Walnut Creek, Brentwood, and Contra Costa County reconnect with the conversations and moments they love.
Toby S. Hill, ACA, BC-HIS
Owner & Hearing Instrument SpecialistRachelle A. Hill
Office Manager / Bookkeeper / CFORachelle A. Hill is the Office Manager, Bookkeeper, and CFO at Contra Costa Hearing Aid Center. With more than 22 years of office experience and a Certificate in Accounting, she brings extensive accounting and customer-service expertise to the practice.
If you have any questions regarding your account, Rachelle is always happy to assist.
Michelle Wolfe
Patient Care Coordinator, Walnut CreekMichelle Wolfe is the Patient Care Coordinator at our Walnut Creek office. She supports patients with intake, scheduling, and friendly front-office care.
From the first phone call through every follow-up visit, Michelle helps make each patient's experience smooth and welcoming.
Sabrina Smith
Patient Care Coordinator, BrentwoodSabrina Smith is the Patient Care Coordinator at our Brentwood office. She welcomes patients and helps with scheduling, intake, and day-to-day care.
Sabrina works to ensure every visit runs smoothly so patients can focus on their hearing health.
Keri Hill-Oxnam
Administrative Assistant, BrentwoodKeri Hill-Oxnam is the Administrative Assistant at our Brentwood office. She graduated from CSU Chico in 2012 with a Bachelor's degree in both Music Education and Vocal Performance.
Keri is currently in the process of obtaining her hearing aid dispensing license, expanding the ways she can support patients at the practice.
Complete Hearing Care, Contra Costa
From hearing evaluations and hearing aids to tinnitus care, real ear measurement, and custom hearing protection in Walnut Creek and Brentwood, CA.
Patient Reviews
Hear from Walnut Creek and Brentwood patients who trust our hearing specialists for expert, no-pressure care.




