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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

Sep 12, 2022

Dr. Vaughan is an excellent sinus doctor. He has been managing my serious, chronic sinus condition for many years. He is very knowledgeable, highly skilled, and careful and thorough in his treatment. He also takes the time to listen to your questions and discuss things with you. Nurse Practitioner, Kathleen Low, is also highly skilled and a great resource, and all the staff at California Sinus Centers are pleasant and professional.
5 Stars

Aug 24, 2022

Dr. Vaughn and his staff, especially Kathleen, are the finest professionals I have ever had. They respond immediately to any problem I have, either with an email or if necessary, an appointment usually within 24 hours. I don't know what I would do without them.
5 Stars

Aug 22, 2022

Dr. Vaughan removed a number of polyps from my sinuses some years ago and he and his excellent staff have monitored my health with periodic visits that are quick and easy. Under their care, my sinus health has been dramatically better. (I should also note that several of the staff at my allergist's office have told me how much they respect Dr. Vaughan.)
5 Stars

Aug 22, 2022

I've been to many ENTs and Dr. Vaughn is the best ENT EVER!!!! I have serious sinus disease (6 sinus surgeries before seeing Dr. Vaughn). Dr. Vaughn did my 7th and final big surgery about 19 years ago and has kept me out of the hospital ever since. I stayed with him when he formed California Sinus Centers after being the Director of Sinus Dept. at Stanford. If you have sinus disease, Dr. Vaughn is the best doctor to see.
5 Stars

Aug 20, 2022

Dr Vaughn is not only the best doctor that I go to, he's also the kindest and nicest person that I'm so fortunate to know. He and his very competent staff have taken care of me for years, and though Atherton is a bit of a jaunt from San Francisco, seeing him is well worth the trip.
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What’s New at California Sinus Centers

Nasal Polyp Surgery: What To Expect

Nasal polyps are a fairly common condition, and many people don’t know they exist if they are small. They are benign growths, usually tear-dropped shaped, that line your nasal cavity or sinuses. If they begin to affect breathing or cause other issues, your doctor may recommend nasal polyp surgery. Symptoms Of Nasal Polyps Although these…

Chronic Sinusitis And Allergies: What To Know

Do you live with the discomfort and symptoms of chronic sinusitis? By now you probably know you have those annoying seasonal allergies, but they never seem to give you a break. Chronic sinusitis and allergies: what to know. Know The Causes Of Chronic Sinusitis And Allergies We develop chronic sinusitis when our immune system fights…

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…

Ready to get started?

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