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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

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.
5 Stars

Aug 20, 2022

Dr. Vaughn and staff are always attentive and friendly. His knowledge and perseverance resolved a chronic issue i had suffered with for years before seeing him. I highly recommend him to all my friends suffering with sinus problems.
5 Stars

Aug 20, 2022

I have been a patient of Dr. Vaughan’s for several years. His skill, attention to detail, amazing team(Kathleen and staff), could not be better. His educational background, training and vast experience are incredibly impressive. To top this his patient interaction is fantastic, wam and engaging. Seeing him is a bright and positive spot in anyone’s day, no matter what the medical issue is. The follow up is outstanding. If you need care, get in front of Dr. Vaughan!
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What’s New at California Sinus Centers

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…

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…

Ready to get started?

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