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Welcome to California Sinus Centers

We're dedicated to providing the highest level of sinus care throughout Northern California

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"I feel so blessed you came our way.

I’m so grateful we are on the road to recovery! Thank you for investing your knowledge, skills, and compassion towards my son."

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"Your kindness, competency and efficiency make us feel very safe in your care.

Your top-notch office associates are truly the benchmark that we now measure all office encounters by!"

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Find an Office: Atherton · Pleasanton · Sonoma · Walnut Creek

Welcome to California Sinus Centers

California Sinus Centers are the premier centers of excellence in Northern California for the care of patients with disorders of the nose and sinuses. At Cal Sinus we aim to provide the best possible care to our patients in a comfortable and compassionate environment. Our providers are highly experienced surgeons (over 3000 cases) and are fellowship-trained surgeons who are national and international leaders in the field of rhinology. Through efforts in clinical care, education and research we strive to improve your sinuses and overall health.

Advanced Sinus Care

California Sinus Centers specialize in the diagnosis and treatment of complex disorders of the nose and paranasal sinuses.


Our sinus experts are available at locations throughout Northern California’s San Francisco Bay Area and Peninsula.

Your Upcoming Visit

Be prepared for your upcoming appointment by accessing our patient information area

In Office Technology

At the California Sinus Centers we are committed to incorporating technology into our practice to provide the safest, most effective and accessible sinus care to you and your family members.

Meet Our Providers

Karen J. Fong, M.D.
Karen J. Fong, MD
Winston C. Vaughan, M.D.
Winston C. Vaughan, MD
Kathleen Low, NP
Kathleen Low, NP
Dorothy Yip, PA-C
Dorothy Yip, PA-C

What Our Patients Are Saying

5 Stars

Jan 31, 2022

I was a patient of Dr. Fong‘s a few years ago. I was plagued by recurrent sinus infections and fatigue. She recommended sinus rinses. This has worked wonders and I think I’ve only had one sinus infection in the interim and feel much better. That was a great help!
5 Stars

Dec 2, 2021

I appreciate the terrific care and service provided by Dr. Vaughan and team. Dr. Vaughan's diagnostic process is brilliant, you see what he is seeing in real-time, an involvement that is educational and calming Dr. Vaughan is straightforward and engaging, besides being funny and a good guy. Felt like I was in expert hands. And his staff Jackie and Kathleen are terrific, going above and beyond to ensure medicine access that Medicare found complicated. Hope not to need surgery, but if I do, I am grateful to be in Dr. Vaughan's care.
5 Stars

Nov 20, 2021

I have found Dr. Vaughn and his entire staff to be extremely professional, helpful, and competent. Dr. Vaughn has provided a level of exemplary compassionate, timely, effective, and friendly treatment at each visit. His follow-up and attention have been flawless. I highly recommend Dr. Vaughn / California Sinus Centers.
5 Stars

Sep 24, 2021

I have been a patient of Dr. Winston Vaughan for over 4 years now. I have had sinus problems my entire life and have seen dozens of doctors during this time. Dr. Vaughan is the best of the best. He takes the time to listen to what is wrong with you and provides gentle, expert care using has vast amount of education and experience. You wont be disappointed.
5 Stars

Sep 24, 2021

Dr Vaughn is an amazing sinus specialist and we are so grateful to have found him. He is intelligent, sensitive, caring, and he listened to all of our concerns. Dr. Vaughn is the one-in-a-million doctor who everyone is looking for and wishes they could find. Do not hesitate to see him...he is the best!
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What’s New at California Sinus Centers

Do you accept my insurance?

We are a preferred provider for Medicare and many of Northern California’s PPO healthcare plans. We are a member of very few HMOs. Patients that have Anthem Blue Cross through Covered California, Select Networks, Sutter, or Kaiser Plans are welcome to pay for their visits on a cash-pay basis. Student Health Insurance plans often require…

Respiratory Protocols

We at CalSinus hope that you, your friends and your families are well. We are open to provide your CARE. To continue to protect the health of our patients and staff during this pandemic, we are taking aggressive precautions -so we can provide the Sinus/ ENT care that our community needs in the greater Bay…

California Sinus Centers Atherton Celebrates 10 Year Anniversary

April 1, 2019 marked the 10 year anniversary of the California Sinus Centers Atherton office! To celebrate this milestone, Dr. Vaughan treated his staff to a weekend getaway in Sonoma, California complete with hand made jewelry for each staff member. The team spent 3 wonderful days reflecting on the past 10 years, getting to the…

Ready to get started?

Contact us today to request an appointment with Northern California’s premier sinus center